Passengers are permitted ________only one piece of hand luggage onto the plane.[ ]

That rude boy ________ have rushed out of the classroom when Ms Green was giving a lecture, which finally led to his being punished by the head teacher.[ ]

_______ difficult the task may be, we must finish it on time, because we can’t meet such a precious opportunity _______ we have expected.

It was going to be some time _____ he would see his father again.

____ for the terrible coal mine accident, as the public thought, the mayor of the city felt nervous andwas at a loss what to do.[ ]