Question

【题目】--- I was scolded by the teacher.

--- You are so silly not ____ your homework .

A. to have done B. to do

C. doing D. having done

Answer 1

【答案】A

【解析】选A，形容词后用动词不定式做原因状语，因为是已经发生动作，故用不定式的完成时态。