用括号内所给单词的适当形式填空
【小题1】He left home in a hurry because he had some problems ________ (solve) in his office.
【小题2】I don’t like travelling by plane. I think it’s ________ (safe) to travel by train.
【小题3】________ (luck), modern medicine can help people with eye problems in some developed countries.
【小题4】They ________ (plan) a trip to Disneyland at this time yesterday.
【小题5】--- Excuse me, where is the ________ (lady) room?
--- It’s over there.

It’s time ________ go to bed. (    )

A．to

B．for

C．and

Do you want ________ (to go/ going) to the park?

用所给单词的适当形式填空。
【小题1】Water is very________(use).
【小题2】We use wood________(make) chairs.
【小题3】Trees help________(keep) the air clean.
【小题4】________(protect) the Earth, we should________(save) water.
【小题5】Look! They________(do) a project.
【小题6】Please tell________(they) about Christmas.
【小题7】He starts________(sing).

I want to a policeman. ( )

A．am

B．is

C．be