用could,must,mustn't填空.look at the sun.it （）be 12.we have to go home for lunch.2.lt’s dangerous.you （）swim in the lake.3.the pen isn't yours.whose（）it be?4.you （）be hungry after all that walking.5.be quiet!you（）talk in
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用could,must,mustn't填空.look at the sun.it （）be 12.we have to go home for lunch.2.lt’s dangerous.you （）swim in the lake.3.the pen isn't yours.whose（）it be?4.you （）be hungry after all that walking.5.be quiet!you（）talk in
用could,must,mustn't填空.
look at the sun.it （）be 12.we have to go home for lunch.
2.lt’s dangerous.you （）swim in the lake.
3.the pen isn't yours.whose（）it be?
4.you （）be hungry after all that walking.
5.be quiet!you（）talk in the library.
6.the light in Peter's room is on,so Peter （） be at home.
7.Don't go too far in the forest,or you （）get lost.
8.that man in black（）be Mr Smith.l know him well.
9.you（）do the cleaning on the first day of the Chinese New Year.
10.lhaven't seen Lucy for almost ten years.she （）be a big girl now.
用could,must,mustn't填空.look at the sun.it （）be 12.we have to go home for lunch.2.lt’s dangerous.you （）swim in the lake.3.the pen isn't yours.whose（）it be?4.you （）be hungry after all that walking.5.be quiet!you（）talk in
1,could
2,mustn't
3,could
4,must
5,mustn't
6,must
7,could
8,must
9,could
10,must