问题
选择题
—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
答案
答案：B
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—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
答案：B