You _ swim in this river of the park. It"s dangerous ! [ ]A. mustn

题型：同步题难度：来源：

You _    swim in this river of the park. It"s dangerous !        [     ]
A. mustn"t
B. needn"t
C. won"t
D. aren"t

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举一反三

My friend has lost his blue bike. This one           his.       [     ]
A. maybe
B. must be
C. might be
D. is

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用must, might, could或can"t填空1. It"s too late;            they be doing the experiment?
2. The large shoes             be Jim"s. He has small feet.
3. The baseball             be Sally"s or Ann"s. They both play baseball.
4. The toy    ____ be Deng Hai"s. He is the only little kid.
5. I don"t know.  It            be a stick.

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The book          be Jane"s. You can see her name on it．[     ]
A. can"t
B. could
C. must
D. mustn"t

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I can play tennis，but my sister ________．    [      ]
A．don’t
B．can’t
C．doesn’t
D．isn’t

题型：吉林省期中题难度：| 查看答案

—Listen! Is it Linda singing in the next room?
—No, it _    be her. She is still in Shanghai. [     ]
A. can"t
B. couldn"t
C. may not
D. might not

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