31. He _____ have come here yesterday, but he didn’t.
| A．could | B．should | C．ought to | D．all the above |
Although Jack has made good preparations for the match, he is still about his chance of winning.
| A．stubborn | B．steady | C．sceptical | D．straightforward |
It’s quite natural that kids like to play with friends _______ their own age.
| A．of | B．at | C．with | D．in |
—I’m sorry. I shouldn’t have been rude to you.
—You _______ your temper but that’s all right.
| A．have lost | B．had lost | C．were losing | D．did lose |
John has tried many ways to solve the physics problems, but _______ works.
| A．neither | B．no one | C．none | D．nothing |
When the teacher speaks, we have to keep quiet, ?
| A．don’t we | B．mustn’t he | C．haven’t we | D．doesn’t he |