Dưới đây là các từ thích hợp để điền vào chỗ trống:

6. Metal rock is somewhat different **from** other types of rock music.

7. Are you aware **of** the regulation against smoking in this area?

8. I'm not familiar **with** that song.

9. She is keen **on** stamp collection.

10. The room was crowded **with** students.