Why are you late again—Something happened to our friend Wang Fei. I _____ tohelp him.

He asked me _________ his story .

Have you mended your shoes, Bob—Yes, I _________ them twenty minutes ago ．

Is it going to be colder tomorrow— Yes. The radio says it will be five zero.

155. The teacher was a little angry becausethe students didn’t _____ their exercise books on time.