题目内容
( ) 4. —What this machine to do?
—Sorry,I don’t know. You can ask that worker.
A. does; use B. is; using
C. is; used D. are; used
4.C首先要明确这是被动语态，排除A和B;machine是单数，故选C.
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( ) 4. —What this machine to do?
—Sorry,I don’t know. You can ask that worker.
A. does; use B. is; using
C. is; used D. are; used
4.C首先要明确这是被动语态，排除A和B;machine是单数，故选C.
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