Student are told _____ very careful when they are doing experimen_其他解答

Student are told _____ very careful when they are doing experiments.
A should beB.be C. to beD.will be
为什么选C,理由一定要详细.
tell sb sth 为什么这里用to be

人气：198 ℃　时间：2019-11-09 18:34:49

解答

不定式从句,tell sb to do sth,告诉某人去做某事.这题是被动语态,所以就是 are told to do!