Only after he had spent several nights working on the math problem _______ to wonder whether the problem was wrongly set.
There goes the bell for the class.Let’s stop___.
--Must we hand in our homework now?---No, you ___. You ___ hand them in before Friday.
When I was walking in the street, I heard my name ___.
We ___ to the farm last week.
You’ ll feel better as long as you ___ the doctor’s advice.