Thirty years ago, there ________ no underground stations in Shenzhen. (    )

A．were

B．is

C．was

I _____ the Great Wall in the winter vacation. (   )

A．visit

B．visited

C．visiting

按要求完成句子。
【小题1】Everyone _________ (study) hard every day!
【小题2】Our teacher _________ (learn) us to play ping-pong yesterday.
【小题3】Danny couldn’t _________ (throw) the ball.
【小题4】My father _________ (answer) me some questions now.
【小题5】Did he _________ ( watch)a basketball this morning?

Yesterday I _____ at home all day because I had a fever.

A．stay

B．stayed

C．staied

Last week, Xiaoming ________ to Hangzhou with his parents. （    ）

A．go

B．goes

C．went