根据所给首字母提示，在横线上写出符合句意的单词。

1. J______ the first is New Year's Day.

2. — May I borrow your bike? — C______!

3. The old man can n______ read nor write.

4. We should brush our t______ before going to bed.

5. Summer is the h______ season of the year.

（）构成了网络的主体彼此为了相互的利益而对对方实施管理或与对方合作的方法。

A.协议

B.内容

C.沟通

D.协同