tookawayourteacher'scellphonewithoutbeingpermitted
Tomtookawayourteacher'scellphonewithoutbeingpermitted.
Really?ican'timaginethathe_____havedonesuchathing.
A.mustB.mayC.canD.should
shouldhavedone是本来应该做的事没做.‘这个句子不是已经做了吗?怎么理解选择D.