The stranger stopped and turned around ____ to see if someone was following him [ ]

Don’t worry, Jim. I can lend you the money.—Thank you very much, Bob. You are always so __________.

Let’s__________ and have a rest.

.He was _________down for several days after he heard the bad news .

33Only after he had spent several nights working on the mathproblem_______to wonder whether the problem was wrongly set