市场经济会推动劳动生产率的不断提高，人们在市场经济中必须遵循等价交换的原则。这里的“等价交换”[ ]

A．是指每次商品交换都必须是等价的

B．是指每次交换商品的价格都应与价值相一致

C．是从一段较长时间看，商品的价格总的来说仍然与价值相符合

D．表明等价交换的次数多于不等价交换的次数

动词填空。

1. How do you study Chinese? By ______ (read) a lot of books.

2. You need _____ (wear) warm clothes, or you'll catch a cold.

3. Students should be ______ (ask) to study hard.

4. There are about eight ______ (million) people in our city.

5. I'd wait for her to introduce _______ (she) to me

6. If I _______ (be) you, I _______ (take) a long walk before going to bed.

7. I spend half an hour _______ (watch) football matches.

8. She 'd invite me _______ (have) dinner at her house.

9. I listened to a song _______ (call ) Heart String.

10. This book must belong to _______ (he).