一、选择题1．You will never gain success ______ you fully put your effort into your work.A．although B．unless C．if D．because2．— Can you tell me when you are going to arrive there?—I’m not sure. But I’ll ring you up as soon as I _____there tomorrow.A．arrive B．arrived C．will arrive D．am going to arrive 3．Jenny often eats a lot of fruit andvegetables_______she knows they are good for health.A．because B．but C．or4．Li Lei didn’t go to bed his mother came back last night.A．after B．until C．because5．I still have difficulty ________the article________ there are few new words in it.A．to understand; because B．understand ; though C．understanding ; if D．understanding ; though6．I don’t like nuts ________ they are too hard.A．if B．after C．when D．because 7．The little girl is crying，she can’t find her parents.A．and B．but C．so D．because 8．—I’m afraid I can’t finish the job in such a short time.—Don’t worry. Can you do it if you_______ two more hours.?A．give B．are given C．will give D．will be given 9．______ we have different opinions from time to time, we are still good friends.A．Until B．After C．Because D．Though 10．—Mum, will our trip be cancelled?—No, we won’t put it off________there is a natural disaster.A．if B．whether C．unless D．when 11．—Do you think if I am suitable for this IT job?—You can’t get the job________ you have experience in the computer industry.A．if B．unless C．because D．since12．You will never get anywhere you set a goal. So whatever we do, we should first have a goal.A．unless B．because C．though13．________ they are sisters, they don’t look the same.A．Though B．Because C．But14．Joan was walking in the street________ she saw the accident.A．when B．while C．after D．before 15．Now most families have only o ne child _____ our country’s one-child policy.A．so B．because C．because for D．because of16．________ you've tasted them, you can't imagine how delicious the dishes are. A．Because B．Although C．Unless D．So17．_______you can sleep well, you will lose the ability to concentrate, plan and stay active after one or two nights.A．Once B．Unless C．If D．When18．__________ what he explains to you, just don’t believe him.A．However B．Even though C．But D．No matter 19．— When shall we start?—Let’s wait ________ the ra in stops.A．if B．as C．until D．since20．—How’s the weather tomorrow?—I don’t know if it ___________ tomorrow.—Well, if it ___________, I won’t go out with you.A．will rain; will rain B．rains; rainsC．rains; will rain D．will rain; rains21．I didn't accept his help ________ I wanted to try it myself.A．because B．thoughC．until D．unless22．Mr.Green doesn’t have any hobbies________ you call watching TV a hobby.A．though B．unless C．because23．My father was watching TV ______ my mother was cooking.A．when B．untilC．while D．as soon as24．— What should I do if I ______ behind others in my study?— You are going to work really hard to catch up with them.A．fall B．will fall C．fell25．--______ will the discussion last?--______ we reach an agreement.A．How long; Not until B．When; Not untilC．How long, Until D．When, Until【参考答案】***试卷处理标记，请不要删除一、选择题1．B解析：B【解析】句意：除非你全身心地投入到工作中去，否则你永远不会成功。
考查连词辨析题。
A. although尽管，表让步；B. unless除非，表条件；C. if如果，表条件；D. because因为，表原因。
本句是条件状语从句，根据句意语境，可知if不合句意，故选B。
2．A解析：A【解析】句意：----你能告诉我你什么时候到吗？-----我不确定。
但我明天一到那儿就给你打电话。
A. arrive一般现在时；B. arrived一般过去时；C. will arrive一般将来时；D. am going to arrive一般将来时。
as soon as引导的时间状语从句表将来的事时，这时主句用一般将来时，从句用一般现在，即：主将从现。
本句主句是一般将来时，从句用一般现在时，故选A。
3．A解析：A【解析】【分析】【详解】句意：Jenny经常吃很多蔬菜和水果，因为她知道它们对健康有利。
本题考查连词。
A. because 因为，表原因； B. but但是，表转折； C. or或者，表示选择。
分析句子知，“Jenny经常吃很多蔬菜和水果”，是结果，“她知道它们对健康有利”表示原因；故选A。
4．B解析：B【解析】【详解】句意：李雷昨晚直到他妈妈回来才睡觉。
考查连词辨析。
after在……以后；until：直到；because因为。
连词短语not…until：直到……才……；结合句意可知选B。
5．D解析：D【解析】【详解】句意：虽然这篇文章有很少的生词，但我还是很难理解。
考查非谓语动词及连词。
understand理解；though虽然；because因为；if如果，是否，根据固定搭配have difficulty（in）doing sth做某事有困难，排除A和B，由后面的there are few new words in it和前面的句子have difficulty understanding the article可知，though最符合语境，排除C，故选D。
6．D解析：D【解析】【分析】【详解】句意：我不喜欢坚果，因为他们太硬了。
考察原因状语从句。
if表示如果，after表示在….之后，when当….时候，because因为。
根据句意，这里表示因果关系，所以选D。
7．D解析：D【解析】【分析】【详解】句意：这个小女孩正在哭，因为她找不到她的父母了。
考查连词。
根据句意可知，小女孩哭的原因是找不到父母了，所以后句表示哭的原因。
and 并列连词，并且；but并列连词，但是，表示转折；so连词，因此，表示结果；because连词，因为，表示原因。
根据句意，故选D。
8．B解析：B【解析】【分析】【详解】句意：——我担心我不能在这么短的时间里完成工作。
——不要担心，如果再多两个小时，你做得到吗？考查if引导的条件状语从句。
give给，原形；are given被给，被动语态；will give将会给，将来时；will be given将会被给。
在if引导的状语从句中，用一般现在时代替一般将来时；主语you是动作的承受者，所以用被动语态。
故选B。
9．D解析：D【解析】【分析】【详解】尽管我们不时有不同的意见，我们仍然是好朋友。
考查连词辨析，Until到……为止；After……之后；Because因为；Though尽管。