The pupils said that a number of questions ______ too difficult.A、areB、isC、wer

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问题 The pupils said that a number of questions ______ too difficult.

选项 A、are
B、is
C、were
D、was

答案 C

解析本题测试的是主谓一致的用法和时态。主句为过去时，故从句也应是过去时；a number of questions“一些问题”为复数，其谓语动词需用复数。因此本题答案为C。

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