The students were____ over the____ problem,listening to the teacher with a ____ expression on theirfaces.[ ]

Is＿necessary to tell his father everything

Is Jim coming by train —I’m not sure. He _________ drive his car.

There are a number of methods to provide relief from your toothache, which can’t cure the problem.

tending to be ill, the candidate tried to run away from _______ issues, which always aroused too much debate.