题干

The professor ________at 8 o’clock,but he has not shown up yet,which worries all of us.
A.was supposed to arriveB.must have arrived
C.might have arrivedD.was supposed arriving
上一题 下一题 0.64难度 单项选择 更新时间:2013-12-02 03:30:11

答案(点此获取答案解析)