【题目】Many artifacts ________ for the first time in the National Museum at present.
A. were exhibited B. were being exhibited
C. are being exhibited D. are exhibited
在线课程【答案】C
【解析】考查动词时态与语态。句意：许多史前古器物目前正在国家博物馆首次展出。根据时间状语“at present”可知，句子描述现在正在进行的动作，主语artifacts与谓语exhibit之间是被动关系，故用现在进行时的被动语态。故选C。