Matter is the name(give) to everything which has weight and occupies space.

He refused to tell us whether he(undertake) the job.

How longthey(dig) the ditch?

he teacher told them since light(travel) faster than sound,lightning(appear) to go before thunder.

The director recommended that she(study) more English before going abroad.

“Have you moved into the new flat? ” “Not yet. The rooms(paint). ”

He fell asleep immediately last night; he must(be) very tired.

He asked me whether my brother(fly) to Beijing.

A great number of small power stations(set up) in their county since liberation.

Those who’d like to visit the exhibition(sign) your names here.