Mark the letter A, B, C or D to indicate the correct answer to each of the following questions.

Câu hỏi

The wall ________ before you paint it.

A. must be cleaned

B. should cleaned

C. might been cleaned

D. might clean

Đáp án
A. must be cleaned

Câu hỏi thuộc Bài tập:

Ms. Dung Purple - Unit 6: Gender Equality - Grammar: Passive Voice