{01}Why did you take a taxi____you could come here by bus?
A.while
B.unless
C.when
D.until
解析:本题考查连词when的一词多义。此处When相当于since .How can I help them to understand when they won’t listen to me?其余的选项没有这个用法。 【标签】连词一词多义 本题选C。 {02}I have worked with children, so I know _____ to expect in my job.
A.what
B.how
C.where
D.why
解析:考查疑问词的用法。句意:我和孩子们在一起过过,所以我能预料在我的工作中需要什么。 本题选A。 {03}It was seven o;clock in the morning ____ he came back.It was really at seven o’clock ___ he came back from work this morning.
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