题目内容
【题目】I ______ at school now, but I ______ at home an hour ago.
A.am, am
B.was, was
C.am, were
D.am, was
【答案】D
【解析】第一个空时间状语是 now，故动词用 am，第二个空时间状语是 an hour ago，用一般过去时，主语是 I ，故动词用was。选D。
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题目内容
【题目】I ______ at school now, but I ______ at home an hour ago.
A.am, am
B.was, was
C.am, were
D.am, was
【答案】D
【解析】第一个空时间状语是 now，故动词用 am，第二个空时间状语是 an hour ago，用一般过去时，主语是 I ，故动词用was。选D。