首字母填空。

1. Swallows usually stay in the south in winter and fly to n_______ countries in summer.

2. Don't throw l_______ into the river. It may waste water.

3. There are many t_______ visiting the places of interest in Beijing every year.

4. "Don't shoot any birds," he said to the hunter a_______.

5. Millie was so c_______ that she forgot to bring her homework yesterday.

6. Our school is a m_______ one. Boys and girls have lessons together.

7. After having Home Economics, I know how to cook healthy and t_______ meals.

8. We usually have PE t________ a week.

9. You will find it u________ to learn English well after you leave school.

10. English is one of my favorite s_______.

心理的个体发展具有的一般特点是（）。

A.定向性与顺序性

B.连续性与阶段性

C.个别差异性

D.不均衡性

E.关键性