初中英语情态动词填空题

You must 　   　（go） to the doctor because your temperature is higher than usual.

﹣﹣﹣Listen! Is that Linda playing the piano in the room？

﹣﹣﹣No． It         be Linda， she has gone to London．（　　）

A．may notB．needn'tC．can'tD．mustn't

This machine can　　（translate） simple messages into 24 different languages．

Kids shouldn't 　　（swim）in the river without adult．