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题目
The visitors were surprised to see so many buildings going up at the same time.
为什么用going up形式

提问时间:2021-02-27

答案
The visitors were surprised to see so many buildings going up at the same time.参观者惊奇地看到,许多建筑物在同一时期拔地而起.see .sb do /doing do 原形表示看到全过程,doing 表示看的时候,“正在做”;显然...
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