I was doing my homework _______ a dog came in.
A.when | B.while |
C.a(chǎn)s | D.At |
A
解析試題分析:句意為:一只狗進(jìn)來的時(shí)候我正在做作業(yè)。這是一個(gè)時(shí)間狀語從句,當(dāng)主句的動(dòng)作是持續(xù)性的,而從句動(dòng)作是短暫性的,此時(shí)用when引導(dǎo)時(shí)間狀語從句,主句用過去進(jìn)行時(shí)時(shí),從句用一般過去時(shí)。當(dāng)主句的動(dòng)作是短暫性的,從句的動(dòng)作是持續(xù)性的,此時(shí)用while引導(dǎo)從句,主句用一般過去時(shí)時(shí),從句用過去進(jìn)行時(shí)。故選A。
考點(diǎn):考查連詞的用法。
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