Question

【题目】--- Who cleaned the classroom?

--- We consider Tom it.

A. to clean

B. cleaning

C. to have cleaned

D. to have been cleaning

Answer 1

【答案】C

【解析】句意：--- 谁打扫了教室。--- 我们认为是汤姆干的。事情已经做完，所以用非谓语动词的完成式。