根据句意及首字母提示，写出单词。

1. We are going to s         our homework to our teachers by email in the future.

2. Daming is writing on the b        with chalk.

3. They will send their homework to the teachers by e        .

4. Everyone will study at home in the f         .

5. Mr. Li is t         to some parents in the classroom.

现场巡检服务、网络规划服务均属于免费服务。