一Mom, I took my partner's math book home by mistake. What should I do?

一Well, you should call her you can say sorry to her.

A. as if B. so that

C. even though D. ever since

B 【解析】句意：--妈妈，我错把我伙伴的数学书带回家了。我该怎么办？--哦，你应该给她打电话以便可以跟她道歉。A. as if 似乎，好像；B. so that以便；引导的是目的状语从句； C. even though 尽管；D. ever since至今。空格后表示打电话的目的，故选B（以便于）。

We'll achieve our dreams someday we keep trying and never give up.

A. as long as

B. even though

C. so that

A 【解析】句意：只要我们坚持努力永不放弃，总有一天我们会实现我们的梦想。 as long as意思是“只要”；引导条件状语从句B. even though意思是“即使”引导让步状语从句；C. so that 意思是“以便，为了”引导目的状语从句。根据句意可知“坚持努力永不放弃”是“实现我们理想的条件”故选A。

（2017·四川乐山· 30）—Did you say anything to your parents ________ they shouted at you?

—No，I was afraid to talk back. They looked really serious and scary.

A. unless B. why C. when

C 【解析】句意：当你父母对你大喊大叫时，你对他们说什么了吗？ ——没有，我不敢顶嘴，他们看起来真的很严肃，很吓人。A. unless 除非 B. why 为什么 C. when当···时候。根据句意可知，“当你父母吼你的时候”表时间，故使用C when来引导时间状语从句。

It’s not always safe to pay over the Internet, you should be careful.

A. so . B. after . C. because . D. as soon as

A 【解析】句意：通过互联网支付并不总是安全的，因此你应该小心。考查连词的用法。A.so因此，所以；B.after 在…之后；C.because；因为；D.as soon as一…就…。根据题干It's not always safe to pay over the Internet，通过互联网支付并不总是安全的，可知应说因此你应该小心。故选A．

_____ Lily is only five years old, _____ she can swim very well.

A. Thought; but B. Because; so C. Thought; /

C 【解析】句意：尽管莉莉只有五岁，但是她游泳游得很好。根据前文_ Lily is only five years old，后文she can swim very well.前后是一种让步转折关系，排除选项B；结合选项，故用Thought尽管，又因Thought不能与but连用，排除选项A。故选C。

（2017年山东德州）Many people like reading newspapers ______ they can learn what's happening in the world.

A. so that B. ever since C. as soon as D. even though

C 【解析】句意: 许多人喜欢看报，以便他们能了解世界上正在发生的事情。考查连词辨析。A. so that以便；结果是，以致于；B. ever since自从；自…以后；从…起；C. as soon as一…就…； D. even though即使，纵然。结合句意和语境可知选A。

一You look so tired. What's wrong?

一I didn't go to bed I finished watching In the Name of People last night.

A. until B. if C. though D. unless

A 【解析】句意：--你看起来很累，怎么啦？--昨天晚上，我直到看完《人民的名义》才上床睡觉。本题考查连词。A. until到……为止；B. if 如果，假设；C. though 尽管，虽然；D. unless除非，如果不。根据前文I didn't go to bed中的didn't，结合后文I finished watching In the Name of People last nig...

“A white elephant” means something that is useless, ___________ it may cost a lot of money.

A. unless B. until C. since D. although

D 【解析】句意：“白象”指的是无用的东西，尽管它可能要花很多钱。考查连词辨析。A. unless除非，引导条件状语从句； B. until直到……才……，引导时间状语从句；C. since由于，引导原因状语从句；D. although尽管，引导让步状语从句。根据句意，本句是让步状语从句， 故选D。

（2017甘肃省白银市中考）______you look after it carefully, this coat will keep you warm through many winters.

A. If B. Unless C. Before D. So

A 【解析】句意：如果你小心保管它，这件外套能让你温暖地度过许多冬天。本题考查条件状语从句。A. If 如果；B. Unless除非，如果不； C. Before 在……之前；D. So因此，所以。根据题干可知“这件外套会使你暖和地度过许多冬天”的条件是“你要小心保管它”句子前后是条件关系，故选择A。

I didn't realize he was a famous scientist you told me.

A. until B. because C. since

A 【解析】句意：直到你告诉我，我才知道他是一位出名的科学家。A. until到…为止；B. because 因为；C. since既然，因为。本题考查固定句式not…until…直到……才。其用法是如果（主）句中的谓语是终止性动词，应采用“not…until”结构，意为“到……时候才” 根据句子结构，结合选项，故选A。