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问题: 模拟卷3-31

---Do you have any idea what Tom did yesterday
afternoon?
---I know he spent at least as much time playing
football as he _________.
A.did writing B.wrote
C.spent to write D.was writing
请详细写出解题的过程和思路。

解答:

这题选A as ...as 连接的是两个词性和在句子的成分相同的部分,所以第二个as 后面也应是doing的形式,即he spent time writing ,为了避免重复,spent time 用did 代替了。