8. Are your ruler under the bed? It is a red one.____________

7. Where is you father? Can you find him?_______

6. Her trousers are orange, and mine is green._____________

5. He is no at school.___________

4. Is your friend a boy and a girl?________

3. What is this at English?__________

2. Is that a English car?________

　Mary is a very pleasant girl to get on well with. She has great interest in Chinese, but doesn't work hard enough. She is good at maths and she spends a lot of time doing maths exercises every day. She likes doing chemistry experiments. Physics is her favourite subject. She is one of the best students in physics in the class. She is always ready to help others.

　　b) 6. C 7. D 8. A 9. C 10. D

　　c) 11. A 12. B 13. B 14. A 15.B

10.第十题考查对最后一段的理解。金属片受热时会弯曲，在适合的温度下它的弯曲度正够启动一个开关，这个开关将热源关闭。由此可推断出：金属片变直，开关便再度把热源打开一定是因为周围空气冷却下来了。cold为"寒冷"，不符合题意。故选C。