Fill in the blanks according to the phonetic symbols.
1. A. release   B. breath            C .please             D. least_______
2. A .item        B. science       C.chemical             D. provide_______
3. A. protect        B. note             C. those       D. whole_______
4. A. oxygen          B. average       C. exchange             D. gas_______
5. A. chemical       B. China          C . cherry     D . choice_______

Complete the sentences with the given words in their proper forms.
6. Children should not eat too much junk food because it is _______. (healthy)
7. The new teacher began his class after he introduced _______. (he)
8. A bath uses even more water than a shower-about _______ as much.(two)
9. Jack is a nice man. He decides to be a _____in the future. (science)
10. The computer can_______ work out the difficult problem in no time. (easy)
11. Noise _______is becoming more and more serious now. (pollute)
12. Policemen are our _____ against the crime in our city. (fight)
13. Uncle Tom opened a shop that sells _____ foods. (nature)
14. All of us were _____ in that _____ short play. (interest)
15. The scientist uses a _____ to clean up the water. (chemistry)
16. The lady with long hair is my new _____ teacher.(chemical)
17. A modern 40-storey building will _____ the houses.(place)
18. Look at this sign! It is _____ to dive here.(danger)
19. Too much sun is _____ to the skin. (harm)
20. The theory is so difficult that I _____ understand it. (hard)
21. Trees can produce some chemicals to protect themselves from _____hurt. (be)
22. Dr. Chen will make a _____ about the need for change.(speak)
23. _____, our team won the competition.(luck)
24. The English newspaper China _____ is too difficult for secondary students to read.They can read Shanghai Students’ Post instead.(day)
25. A great _____ never fears or gives up. (fight)