My mum ________ got a car. She goes to work by bus.

A．has

B．hasn’t

C．haven’t

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).

Grandparents to America before.  (   )

A．went

B．has been

C．haw gone

D．have been

We’ve _____ Lingling’s report.   (   )

A．got

B．get

C．have