249. A_____ has taught us what atoms are made up of and how powerful the atom bomb is.
| A．seaman | B．salesman | C．naturalist | D．Scientist |
—Lucy doesn’t mind lending you her dictionary.
—She _________. I’ve already borrowed one.
| A．can’t | B．mustn’t | C．needn’t | D．shouldn’t |
—I’ve taken someone else’s green sweater by mistake.
—It _________ Harry’s. He always wears green.
| A．has to be | B．will be | C．mustn’t be | D．could be |
You ______ be tired –you’ve only been working for an hour.
| A．must not | B．won’t | C．can’t | D．may not |
I often see lights in that empty house. Do you think I _______ report it to the police ?
| A．should | B．may | C．will | D．can |
— Excuse me, but I want to use your computer to type a report.
— You _______ have my computer if you don’t take care of it.
| A．shan’t | B．might not | C．needn’t | D．shouldn’t |