49.——You didn't wait for Mr.Black last night,did you?——No,bu

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49.——You didn't wait for Mr.Black last night,did you?——No,but we ____.He didn't retur详解
49.——You didn't wait for Mr.Black last night,did you?
——No,but we ____.He didn't return home at all.
A.couldn't have B.needn't have C.didn't need to D.should wait have

C 考查情态动词.根据语境“No”可知“我们没有等”.根据“He didn't return home at all.”说明“我们不必等.”而B项表示已等过.

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