The students didn t manage to work out the problem ______ their teacher had explained how

The training course aims to prepare students for middle management positions.A．这个训练课

Everyone has got a chance to give a speech, ______？A．hasn"t itB．didn"t heC．haven"t theyD．w

Nobody went to visit him when he was accused of killing, ______？A．did theyB．didn"t theyC．w

There happened to be some students in the room, ______？A．didn"t theyB．didn"t thereC．doesn"

The self－important manager didn’t seem to （) much importance to my advice.

The self－important manager didn’ t seem to （) much importance to my advice