【題目】The old lady's hand shook frequently. She explained to her doctor ______ this shaking had begun half a year before, and ______, only because of this, she had been forced to give up her job.
A.when;how
B.how;when
C.how;how
D.why;why

【答案】C
【解析】考查賓語從句。因?yàn)榈谝粋�空后面已經(jīng)給出了時間：half a year before，所以空中就不應(yīng)填 when。如用when句子應(yīng)為She explained to her doctor when did this shaking begin。第二個同理，后面已經(jīng)給出了 only because of this，就不再用why。句大意為：女士的手常常發(fā)抖。她向醫(yī)生解釋發(fā)抖是怎樣從半年前就開始的，還有她是怎么僅僅因?yàn)檫@個不得不放棄她的工作。

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