单词拼写

1. Through years of practice,the old man has a       a lot of knowledge and experience.

2. As a writer,you need to do a lot of t        before you can work out a good novel.

3. —What is your brother's  r        in the army? —Captain.

4. This new computer is well  w        of the price.

5. We should build up a strong army in d       of our great motherland.

6. You must      (服从)the orders from your officer.

7. We have      (温和的)weather throughout the year, neither too cold nor too hot.

8. It is obvious that they have      (误解)each other.

9. We'll have to      (挑选)the best student for the test.

10. The name of the      (接收者)is not clear on the mail.

研究动物行为的方法主要有（　　）

A．观察法

B．实验法

C．刺激法

D．观察法和实验法