题目内容
China ______ a lot of people moving to urban areas in the last 20 years. However, many migrants left their families behind.
- A.saw
- B.sees
- C.has seen
- D.had seen
试题分析:考查时态:句意:在过去的20年中中国见证了很多人搬到都市,然而,很多移民把家人留下了。时间状语是in the last 20 years表示从过去到现在一直在做的事情,用现在完成时,选C。
考点:考查时态
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