1.May be it rained last night.It---- ---- ---- last night

1.May be it rained last night.It____ ____ ____ last night
2.I'm sure he is a teacher.He_____ _____ ______ _____
3.The ground is white.It______(must snow)last night,______?
4.English is very important.You____(must learn)it well,_____?
5.The children are sleeping.You______(mustn't make)a nosie,______?
6.The gril looks well now.She ______(must take)some medicine,_____?
7.You didn't understands me.You____(may dream)just now
8.The teacher works hard.She _____(must be)a good teacher,____?
9.My son studies hard.He______(must pass)driving liscence lest,______?
10.Look at the cloud.It_____rain(can't,mustn't,needn't,needn't,shan't)