As a result, these endangered animals may even __________.
| A．die away | B．die down | C．die out | D．die off |
I told your friend how to get to the hotel, but perhaps I __________ have driven her there.
| A．could | B．must |
| C．might | D．should |
—How’s your tour around the North Lake? Is it beautiful?
—It __________ be, but it is now heavily polluted.
| A．will | B．would |
| C．should | D．must |
—Where is my dictionary? I remember I put it here yesterday.
—You __________ it in the wrong place.
| A．must put | B．should have put |
| C．might put | D．might have put |
— 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 |
The biggest problem for most plants, which ___ just get up and run away when threatened, is that animals like to eat them.
| A．shan’t | B．can’t |
| C．needn’t | D．mustn’t |