8. 　A______ there are four types of blood as far as I know.

7. 　When building m______ cost more, the price of houses increases.

6. 　He is the sort of man who draws a c______ without much thinking.

5. 　She said c______ to me when she heard I had got the full marks for English.

4. 　No p______ has been given for anybody to enter the building.

3. . The old lady w______ why the boy made fun of her.

2.　　　 No one likes to talk to him, because he often speaks with an air of i_____.

1.　　　 Physics may seem terribly dry and complicated at times, but a good teacher can make it i_____ and simple.

10.　　 She couldn’t go to school before l______(解放).

十六。

9. 　However, his k______(知识) of French remained very week.