①网络只是一个交友工具，关键在于怎么使用它

②网络对于交友而言，可以是助力，也可以让彼此更远

③网络对于我们彼此而言，可以让我们更近，也可能让彼此更远

④网络交往，都是虚假的，下了线彼此谁都不认识，不能当真

阅读下面的对话完成任务。

A: Excuse me, Susan. （1）Is this your backpack?

B: No, it isn't. It's Jack's. （2）My backpack is green.

A: Is your computer game in the lost and found case?

B: No, it's Jack's. And that white eraser is Jack's, too.

A: Do you know Jack?

B: Yes, I do. （3）他是一个英国男孩。He's in Class One, Grade Seven.

A: Oh, what's his telephone number?

B: 100-2116

A: Is Miss Miller his English teacher?

B: Yes, you're right.

多音字组词

调tiáo ____    diào____

壳qiào____      ké____

属于氧化物的是（　　）