1.We left early this morning ______ we shouldn't come back before dark.
A. now that
B. as if
C. even though
D. for fear that
【精析】D now that:既然，引导原因状语从句;as if：好像，引导方式状语从句;even though:即使，引导让步状语从句;for fear that:以免，引导目的状语从句。分析句子结构并结合句意可知，空处应用for fear that引导目的状语从句。故选D。目的状语从句通常由下列连词引导：so that(为了，以便)， in order that(为了，以便)， lest(唯恐，以免)， for fear that(唯恐，以免)， in case(以防万一，以防)。
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2.The thief has been caught and he _____ by the police now.
A.has been questioned
B.is being questioned
C.is questioning
D.has questioned
【精析】B 根据后一分句中的时间状语now(现在)可知，and之后的分句描述的是现在正在发生的事情，应用现在进行时。根据句意可知，he和question(质询，问)之间是逻辑上的动宾关系，所以应用现在进行时的被动语态，即谓语动词应用“am/is/are being+过去分词”的形式。故选B。
3.In order to _____ the rising production costs, the subscription rates have been increased.
A.add up to
B.look up to
C.cut short
D.keep up with
【精析】D keep up with跟上。参阅。88注释。Add up to参阅.2注释;cut short 详见.38;look up to(=admire, respect)赞美，尊敬：We look up to the old workers as our teacher.(我们把这位老工人尊为我们的老师。)本题中rates意为“价格，费用”。
4.People who live in a small village are bound to see a good _____ of each other.
A.sum
B.quantity
C.deal
D.amount
【精析】 C
5.Smoking too much will ______ your health greatly.
A.affect B.effect C.infect D. comfort
【精析】A affect：影响;effect：(n.)效应,影响,结果,(v.)使发生，实现;infect：传染;comfort：安慰。根据句意可知，选A。
