9. He warned that his dog was a　　　 　towards strangers.

8. The scientists are interested in e　 　　　the planets besides the earth.

7. Deaf-mutes(聋哑人) usually c　　　 　with each other in sign language.

6. I live just by the station, and it’s very c　　　 　for me to travel by train.

5. The railway started to be built four years ago and is still under c　　　 　.

4. Do you want a s　　　 　or a return, sir?

3. Have you thought of a s　　　 　to the math problem?

2. The contest gives the students a good chance to d　　　 　their talents.

Ⅱ. Fill in the blanks with correct words.

1. The South China Sea is rich in natural r　　　 　, like oil and gas.

15. Will you help me hand out the reading 　　　　　(材料) to the students?