Look! I’ve ________ two letters from the UK. (    )

A．got

B．have

C．get

He has _________Beijing twice. ( )

A．gone to

B．been to

C．went to

D．been in

–Where’s Jim? 
–He ________to England. (    )

A．has been

B．have been

C．has gone

I ________ got a new toy.

A．have

B．has

C．do

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).