Question

【题目】— Excuse me, what's this for?
— It's a cleaner and it to pick up dirt.
A.uses
B.is used
C.is using
D.used

Answer 1

【答案】B
【解析】句意：—这是用来干嘛的？—这是一个吸尘器，用来清理灰尘的。it指代cleaner，与use之间构成被动关系，故用被动语态，因此选B。