发布时间 : 星期日 文章【人教版】2018年英语同步优化指导选修7全套练习册(含答案)更新完毕开始阅读
解析：推理判断题。根据作者的观点，淡化海水非常昂贵，其他来源的水跟冲厕水几乎同样脏，因此循环利用的冲厕水可以作为饮用水水源，故选A。
答案：A
7．Compared with recycled toilet water，treatment of seawater ____________________. A．produces less greenhouse gases B．does less harm to the sea C．costs much more
D．is more friendly to the environment
解析：细节理解题。根据第二段中“...but it’s economically and environmentally far more expensive than toilet water recycling.It also uses more energy and produces more greenhouse gases.”可知，海水处理要昂贵得多，因此C项符合句意。
答案：C
8．The best title for this passage might be “__________________”． A．It’s Time to Drink Toilet Water B．Water Is Scarce C．Seawater Treatment
D．Rivers，Lakes and the Ocean
解析：主旨大意题。根据文章可知，寻找新水源极其困难，冲厕水和其他水源一样，经过严格处理，应该可以成为放心的饮用水水源，因此，A项适合作文章标题。
答案：A Ⅱ.语法填空
阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。
The Internet has become part of young people’s life.1.____________ report shows that 38% of students often use the Internet.Most of them get 2._______ _____ (use) information on the Internet 3.____________ use the Internet to help in their studies.But many students don’t use it 4.____________ a good way.Some play games too much，some visit websites 5.____________ shouldn’t look at.So bad things may happen 6.____________ students spend too much time on the Internet.
It is important for students 7.____________ ____ (use)the Internet properly.Now we have a textbook,8.____________ uses many examples to teach students some good ways to use the Internet.It 9.____________ (give) good advice.
Some students also make 10.____________ on the Internet.But if you want to have a face－to－face meeting with your online friends，let your parents know and meet in a proper place.
语篇导读：本文介绍了学生使用因特网的情况。
1．解析：A 本题考查冠词的用法。根据句意可知，空格处填不定冠词a。
2．解析：useful 本题考查词性转换。分析句子结构可知，空格处需要填一个形容词作定语，修饰名词information，所以填提示词的形容词形式。
3．解析：and 本题考查连词的用法。分析句子结构可知，空格处需要填一个并列连词，连接两个并列的分句。
4．解析：in 本题考查介词的用法。in a．..way为固定搭配，表示“以……的方式”。 5．解析：they 本题考查人称代词的用法。分析句子结构可知，空格处需要填一个人称代词，作定语从句的主语，指代主句的主语some(students)，所以填人称代词的主格形式they。
6．解析：if 本题考查状语从句的连词的用法。分析句子结构可知，空格处需要填一个连词，引导条件状语从句，所以填if。
7．解析：to use 本题考查非谓语动词的用法。分析句子结构可知，空格处需要填一个动词不定式，构成动词不定式复合结构，在句中作真正的主语，前面的it是形式主语。
8．解析：which 本题考查引导定语从句的关系词的用法。分析句子结构可知，空格处应该填一个指物的关系代词引导非限制性定语从句，修饰先行词a textbook，并在从句中作主语，所以填关系词which。
9．解析：gives 本题考查谓语动词的用法。分析句子结构可知，空格处需要填一个谓语动词，根据语境可知用一般现在时的第三人称单数形式。
10．解析：friends 本题考查固定短语。make friends意思是“交朋友”。 Ⅲ.短文改错
(2016·四川高考)It is Mother’s Day today.Though it’s a western festival，it’s popular in China now.
Mom has a full－time job，so she has to do most of the houseworks.She is a great mother.Both Dad or I planned to do something on Mother’s Day.We get up early in the morning.Dad cleaned the house，and then went on shopping.When he came back，I found a bunch of flowers in her hand.I asked Mom to stay in the sitting room and I cooked in kitchen.The dishes
what I cooked were Mom’s favoritest.At dinner，we said to her.“Happy Mother’s Day！”Mom was grateful and moving.
答案：
It is Mother’s Day today.Though it’s a western festival，it’s popular in China now.
Mom has a full－time job，so she has to do most of the houseworks.She is a great
buthouseworkmother.Both Dad or I planned to do something on Mother’s Day.We get up early in the
andgotmorning.Dad cleaned the house，and then went on shopping.When he came back，I found a bunch of flowers in her hand.I asked Mom to stay in the sitting room and I cooked in ∧ kitchen.The histhedishes what what I cooked were Mom’s favoritest.At dinner，we said to her.“Happy that/whichfavorite
Mother’s Day！”Mom was grateful and moving.
moved
Unit 3 Section Ⅲ
Ⅰ.单词拼写
1．He missed the target (靶) only once in the shooting game yesterday. 2．We couldn’t swim because the tide (潮汐) was too far out.
3．Her sad looks reflected (映射) the thought passing through her mind. 4．That dish is too shallow (浅的) to serve soup in. 5．Peel the apples using a sharp (锋利的) knife.
6．I saw the sudden flash of a flashlight (手电筒) in the darkness. 7．He went to the post office to draw his pension (养老金，退休金)． 8．The captain marked the boundary (分界线) of the two villages on the map. 9．This is a narrow(狭窄的) sea that parts the French and English. 10．The headmaster praised the boys for their neat (整齐的) uniforms. Ⅱ.用短语的适当形式填空
become aware of；upside down；be scared to death；reflect on；in danger of；a pack of；in the distance；have a good feed on；hold up；bring in 1．He should have an operation，or he will be in danger of losing his life. 2．You should reflect on the plan for a moment，and then make a decision.
3．Look！The oil painting on the wall is hanging upside down. 4．Not having noticed the man on the corner，Mary was scared to death when she saw him. 5．Tony seemed very shallow and he didn’t become aware of the potential dangers. 6．We heard the bell striking 2 o’clock in the distance. 7．He took a pack of cigarettes from his shirt pocket. 8．After a long tiring day，she is having a good feed on delicious food. 9．Those who agree hold up your hands! 10．A lot of advanced technology will be brought in from foreign countries. Ⅲ.完成句子
1．You should set aside some time to reflect on your successes and failures.(reflect) 你应该留出一些时间来反思你的成败。
2．Though aware of the harm of the smog，they were still exposed to it casually.(aware) 尽管意识到了雾霾的危害性，他们仍然毫不经意地置身其中。
3．With a great many articles to write，she won’t have time to go shopping this morning.(with)
她有那么多文章要写，今天早上将没有时间去买东西了。
4．The train having pulled in，the passengers are boarding it now.(pull) 火车已经进站，乘客正在上车。
5．It grows well (in places) where it is warm and rainy.(where) 它在温暖潮湿的地方长得很好。
6．Seeing nobody at home，the thief decided to break in.(see) 看到没人在家，小偷决定破门而入。
7．Scared to death by the noise，the birds flew in all directions.(scared) 小鸟们被这种噪声吓得要死，纷纷四散而逃。 8．Cut the melon in half using a sharp knife.(use) 用一把锋利的刀把瓜切成两半。
9．It was last year that he started drawing his pension.(draw) 他是从去年开始领取养老金的。
10．Turn the cake upside down and cover it with cream.(turn) 把蛋糕翻过来抹上奶油。
活页作业(九)