[题目]Mark and Mike in the library an hour ago. Now they in the classroom.A. are; are B. were; were C. are; were D. were; are 题目和参考答案——青夏教育精英家教网—

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【题目】Mark and Mike ______ in the library an hour ago. Now they ______ in the classroom.

A. are; are B. were; were C. are; were D. were; are

【答案】D

【解析】第一个句子中“an hour ago”意为“一小时之前”，用于一般过去时态；第二个句子中“now”意为“现在”，用于一般现在时态或现在进行时态。

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