Daniel,it's time for us ____(not talk)in class.

问题描述:

Daniel,it's time for us ____(not talk)in class.
Listen!How nice the music _______(sound)!Be quiet ,the babies_____(sleep)next door.用括号中所给单词的适当形式填空.

1 (not to talk); 2 (sounds);3 (are sleeping).各人意见,仅供参考!