What should we do if it _____ tomorrow?

--- “What will you do during the summer holiday?”
--- “I don’t know, but it’s high time _____ something.”

I’m glad I went over all my notes; otherwise _____ .

--- “Have you ever been to Beijing?”             
--- “No, but I wish I _____”

A few minutes earlier and we _____ the rain.

I _____ you some money, but I hadn’t any on me then.

He treated me as though/as if _____ his own son.

You _____ come earlier. The bus left a moment ago.

Should it rain, the crops _____ . 

_____ today, he would get there by Friday.