问题
选择题
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
答案：D
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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