I need something for cutting the paper. — Oh, you want a knife? OK, I’ll get ______ for you.

A: Where are you now?B: We _________ on the Great Wall of China and talking to you.

Did you find the small village yesterday? —Yes, without any difficulty, for it has __________changed over years.

My mother was . I had to look after her . [ ]

The river smells so terrible! How did it come about?—People used to pour dirty water into it.