—Do you remember he came?
—Yes, of course. He came by train.
| A．that | B．when | C．where | D．how |
—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 |
In crowded places like airports and railway stations, you __________ take care of your luggage.
| A．can | B．may |
| C．must | D．will |