As we came to the work site, the workers were seen _______the new house.A．buildi
题型：不详难度：来源：
As we came to the work site, the workers were seen _______the new house.| A．building | B．build | C．built | D．to build |
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答案
| A |
解析
| 考查非谓语动词。本题考查see sb doing结构，用其被动语态即为sb be seen doing。句意：当我们来到工地的时候，我们看到工人正在建新房子。 |
举一反三
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