初中英语情态动词填空题

﹣﹣﹣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．