Remember to turn off thelights when you leave the room. — ________.

So many _______ there, most of them are fond of fruit juice.—Let’s go to see_______more of fruit juice they need.

We didn’t see Tom at the lecture yesterday.–He _____ it. He had attended the same lecture before.

下列各句中，没有语病的一句是（ ）

He volunteered to work in a remote mountainous village in West China last year, which is still _____ on foot now.