We must plant more trees after we _____ every year.

I won’t tell the student the answer to the math problem until he ______ on it for more than an hour

Tom, it’s cold outside.___ your coat when you go out.- OK. Mom.

Didn’t you have a good time at the party?— Of course I did. As a matter of fact, I had such fun that time seemed to _____ so quickly. [ ]

You haven’t seen the film ‘2012’, have you—_____. How I wish to see it again!