But for the sun to give us light and heat, nothing _______ on the earth. [ ]

I often spend a lot of time ________ after class.

Let me introduce my cousin to you, who _____ to a famous university last year.

We’re heard much _______ about the missing plane, but we still don’t know where it is.

Did you visit your grandparents yesterday?–Yes, and when I got there, they _____ in the fields