Question

【题目】It’s reported that a subway system will be _____ use in 2020 in Taiyuan.

A. put off B. made of

C. put into D. made into

Answer 1

【答案】C

【解析】

考查动词短语辨析。句意：据报道，一套地铁系统将于2020年在太原投入使用。A. put off推迟；B. made of由...制成；C. put into 投入；D. made into制成。be put into use“被投入使用”符合句意。故C选项正确。