A. Because I like swimming.     B. I usually go swimming on Mondays.     

C. Sure. Let's go swimming next Monday. D. No, I don't.     E. I like summer best.

A: Hello Tommy! Which season do you like best?   

B:____

A: Why do you like summer best?   

B:____

A: Do you usually go swimming on the weekend?   

B:____

A: When do you usually go swimming?   

B:____

A: Do you want to go swimming with me?   

B:____

厄尔尼诺与拉尼娜现象是太平洋赤道附近海气相互作用出现异常的典型代表。读图完成下题。

完形填空

      Hey, I'm Simon. I have a strong and faithful dog, Bruce. The dog likes1with me. Sometimes he also follows my father to work. One morning when my father worked in the field, he2 his coat and put it under a big tree. He turned  to the dog and said,“3my coat, Bruce!” Bruce sat down on the coat. Later, my father remembered he had to buy some food.  4 he hurried to the shop.   5 shopping, he went home directly and forgot completely about his 6 and the dog. In the evening, I looked for my dog7 in the house, but I8 find him. At this time, my father suddenly remembered his coat and the dog. He went back to the tree   9. He found that Bruce was 10 sitting on the coat!

下列区别两种不同物质的方法合理的是（　　）