John ______go fishing last Sunday. (    )

A．not

B．didn’t

C．don’t

My grandma was a nurse before.  (对画线部分提问)
_______ ________your grandma _______ before?

Lingling ________ hungry yesterday, so she bought some bread. (　　)

A．is

B．was

C．were

用所给单词的适当形式填空。
【小题1】Do you know how ____________ (protect) the Earth.
【小题2】What can we do ___________(keep) our city clean?
【小题3】--Look at the sign. You can’t talk here.
--Sorry. We ___________(not see) it just now.
【小题4】He would like____________ (go) shopping with you.
【小题5】What __________（make）the river dirty?
【小题6】Well ________(do), children!

The girl ______ walk then. (  )

A．can

B．couldn’t

C．can’t

D．isn’t