There______a lot of rubbish on the floor so I asked Mary to sweep______up.

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问题 There______a lot of rubbish on the floor so I asked Mary to sweep______up.

选项 A、were; it
B、are; them
C、was; it
D、is; them

答案C

解析 there be句型中be动词的单复数取决于其后的主语,此处主语为a lot of rubbish(不可数名词),因此后面谓语动词须用单数。
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