-- Why don't you ask Tom to do it?-- I don' t know whether he is to. He sometimes makes th

问题补充：

-- Why don you ask Tom to do it?

-- I don t know whether he is to. He sometimes makes things worse.

A. possible

B. able .

C. afraid

D. easy

答案：

A. possible

(答案→)B. able .

C. afraid

D. easy

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