Twenty pounds______ enough for such a poor family to spend for a month.

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问题 Twenty pounds______ enough for such a poor family to spend for a month.

选项 A、were
B、being
C、have been
D、was

答案D

解析 表示时间度量等复数名词做主语时,常常作为一个整体看待,谓语动词用单数:Ten miles is a long distance. 10英里是很长的路程。
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