The old radio requires ___________, so you’d better have it __________soon.

What _______ the number of the students in your school —About two thousand. A number of them _______ from the countryside.

Mr. Smith came to Shanghai _________.

he thought he was helping us with thework , he was actually in the way.

So noisy____ in the dining hall that he could only make himself heard by shouting at the top of his voice.