--- There is someone at the door. Who ______ it be? Is it the postman?
--- No, it ________ be him. It’s just seven o’clock. It’s too early.
| A．may, can’t | B．will, won’t | C．may, mustn’t | D．must, may not |
Thisschoolbag is notexpensive.Andtheprice ofit is the of the three.
| A．lowest | B．biggest | C．highest | D．smallest |
—Dad,mustIpractise thepianotoday?
—No,you _.You may doit tomorrow.
| A．needn’t | B．mustn’t | C．shouldn’t | D．can’t |
Youwillfallbehind others youwork hard.
| A．if | B．unless | C．though | D．since |
—Jack, youseemto be .
—Yes.It’s 8:20 now and my trainleaves in tenminutes.
| A．in ahurry | B．in fear | C．in safety | D．in silence |
We find impossible forus tolearna foreignlanguage wellina shorttime.
| A．that | B．this | C．one | D．it |