John plays basketball well，________ his favorite sport is badminton.
| A．so | B．or | C．yet | D．for |
—Can you keep a secret?
—You ________ worry—I'm not going to mention it to anyone.
| A．needn't | B．couldn't |
| C．mustn't | D．won't |
For those of you who ________ a few very popular articles that came out last week, check out this mail.
| A．may miss | B．must have missed |
| C．may have missed | D．would have missed |
Time ________ heal a broken heart. After five years, Steve seems to have got over the sorrow of losing his son.
| A．should | B．would |
| C．shall | D．can |
—David is often absent from class.
—Tell him he ________ answer for it if he goes on behaving like that.
| A．shall | B．might |
| C．would | D．can |
A hot balloon blew up in Egypt. There ________ something wrong with the quality of it.
| A．may have been | B．must be |
| C．need have been | D．might be |