题目内容：

When Mary was young,she （ ）adle to dance very well?A.could be B.can be C.was D.could

优质解答

C翻译：当玛丽年轻/小时,她能跳舞跳得很好.1.句子时间状语从句When Mary was young,很明显表明主句应该用一般过去时,而B为一般现在时,排除.2.固定短语be able to do sth = can do sth,用在一般过去时为：was/were ab...