Young as he is, David has gained ___________ rich experience in ___________ society.
| A．the; the | B．a; 不填 | C．不填; 不填 | D．不填; the |
As you worked late yesterday, you________have come this morning.
| A．mayn't |
| B．can't |
| C．mustn't |
| D．needn't |
The weather turned out to be fine yesterday. I________the trouble to carry my umbrella with me.
| A．should have taken |
| B．could have taken |
| C．needn't have taken |
| D．mustn't have taken |
—She looks very happy. She________have passed the exam.
—I guess so. It's not difficult after all.
| A．should |
| B．could |
| C．must |
| D．might |
Don't be so anxious about that. Helen________a note.
| A．may leave |
| B．should leave |
| C．might have left |
| D．can have left |
—Mum, I climbed to get the Teddy Bear from the top of the shelf.
—My goodness! You________yourself. You________do that next time.
| A．must have hurt; mustn't |
| B．should have hurt; can't |
| C．may have hurt; mustn't |
| D．might have hurt; couldn't |