-- Mary likes swimming.--- ______ .
The workers in the Huashan Mountains have to ______rubbish to keep the mountains clean.
— Whose shoes are these?— They ____ be Mike’s. They are much too large for him.
The little child was too _______ to hear the end of the long speech.
We should learn_______ each other.
Attention , please! All the mobile phones _________during the meeting.