As students, we ________ study hard to make our country more beautiful and stronger.

I don’t want to make friends with those people ______ think of themselves first when in trouble.

What did the teacher say just now? — Sorry. I didn’t catch it. I ____ something else.

Dave is a reporter. He works _____.[ ]

Could you tell the differences _____ these two words? — OK, let me have a try. [ ]