8. It’s 　　　(danger) to cross the street when there is much traffic.

7. Listen! Who 　　　(sing) in the next room?

6. He has been to 　　　(English) twice.

5. I think buses make 　　(little) pollution than cars.

4. She entered the room and turned on the 　　(electricity) light.

3. He feels 　　(surprise) that she has passed the exam.

2. He 　　　(pick) up some garbage on his way to school yesterday morning

1. My uncle is an 　　　(engine) in a big factory.