题目内容
20．按要求完成句子（每空1分，共20分）．A）句型转换，按括号内的要求转换下列句型，每空填一词．Read the exam questions carefully，or you'll make some mistakes．（改为复合句）
You'll make some mistakesifyoudon'tread the exam questions carefully．
分析 仔细看考试问题，否则你会犯错．
如果你不仔细看考试问题，你就会犯错．
解答 答案：if，don't．原句是祈使句+or+陈述句结构，可以与if引导的条件状语从句互换，结合句意仔细看考试问题，否则你会犯错．也就是说如果你不仔细看考试问题，你就会犯错．if引导的条件状语从句，遵循主将从现的规则，从句主语you，故don't，故答案是if，don't．
点评 祈使句，+and+陈述句：在这里祈使句相当于if 引导的条件状语从句（但此时去掉and）．
Give blood （ if you can ）and many lives will be saved．
练习册系列答案
相关题目
15．
Students these days often have a lot of （51）worries．Sometimes they have（52）problemswith their
schoolwork，and（53）sometimeswith their friends．What can they do about this？Some people believe
the （54）worstthing is to do （55）nothing．Laura Mills，a （56）teenagerfrom London
agrees．"Problems and worries are （57）normalin life，"says Laura，"but I think（58）talking to someone helps a lot．（59）ifwe don't talk to someone，we'll certainly （60）feel worse．"
| talk feel worry normal（正常的） bad problem if nothing sometimes teenager |
schoolwork，and（53）sometimeswith their friends．What can they do about this？Some people believe
the （54）worstthing is to do （55）nothing．Laura Mills，a （56）teenagerfrom London
agrees．"Problems and worries are （57）normalin life，"says Laura，"but I think（58）talking to someone helps a lot．（59）ifwe don't talk to someone，we'll certainly （60）feel worse．"
5．Sometimes we find it hard to accept the customs in other countries，especially if they have differences from ours．Here are some tips about accepting foreign cultures．
Develop an open mind．Open the door of your mind to accept what other people believe．Try not to think that a custom is bad when you haven't taken a close look at it．You may not agree with it，but you should try to respect it．
Take a look at history．From that you can learn a lot about other countries．When you start doing this，you will understand how things have gathered to form the world we live in today．
Talk to people．If you know people from different cultures，talk to them．Therefore，you can get to know the way they think about things．
Try their way of doing things．With their traditional food，you will get closer to their culture．
Develop an open mind．Open the door of your mind to accept what other people believe．Try not to think that a custom is bad when you haven't taken a close look at it．You may not agree with it，but you should try to respect it．
Take a look at history．From that you can learn a lot about other countries．When you start doing this，you will understand how things have gathered to form the world we live in today．
Talk to people．If you know people from different cultures，talk to them．Therefore，you can get to know the way they think about things．
Try their way of doing things．With their traditional food，you will get closer to their culture．
| Some Information about （86）ForeignCultures | |
| It's hard to accept foreign customs | Especially if they are（87）differentfrom ours． |
Some useful tips | 1．You may not agree with it，but you are （88）supposedto try to respect it． 2．Take a look at history． 3．Talk to people from different cultures．Therefore，you can know the way （89）they think about things． 4．Trying their traditional food will help you get（90）closerto their culture． |
12．You can't get good grades _____ you study harder than before．（ ）
| A． | if | B． | unless | C． | when | D． | so |