―I wonder _______they are waiting.―At the bus stop.

I called you yesterday evening, but nobody answered the phone. –Oh, I ___ a walk with my parents at that time.

He has been in the USA .

When you’ve finished school, don’t forget to come back to visit your school, ______?

What did Mr Wu tell you to do, Jim?—He told me to go home early and _____ in the street.