用所给单词的适当形式填空。

1. Everyone ______(tell) me that you're a unique boy.

2. There are many things ______(write) about.

3. Her sister is a good ______(sing).

4. My sister finished ______(pack) the bag just now.

5. They brought us a piece of ______(excite) news.

6. The old man is carrying a big box. He is very ______(health).

7. Look! The kids are enjoying ______(them) under the tree.

8. The other students kept their eyes ______(close).

具体运算阶段的思维特征有()

A.多维思维

B.思维的可逆性

C.去自我中心

D.命题思维

E.具体逻辑推理