用所给单词的正确形式填空。
1. My uncle is an (engine) in a big factory.
2. He (pick) up some garbage on his way to school yesterday morning.
3. He feels (surprise) that she has passed the exam.
4. She entered the room and turned on the (electricity) light.
5. I think buses make (little) pollution than cars.
6. He has been to (English) twice.
7. Listen! Who (sing) in the next room?
8. It's (danger) to cross the street when there is much traffic.
9. China is an (Asia) country.
10. This is my (two) e-mail.
