根据下列句子及所给单词的首字母写出所缺单词。

1. Because the office is so far away from his home, he has to d__________ to office every day.

2. I was s_________ to see Ann in the street. She went to America three years ago.

3. When you are in the museum, remember not to t__________ things on show.

4. We need two more students to help me c_________ these heavy bags.

5. Please make sure that you have got a c_________ answer before you hand in your paper to me.

船舶在A3海区遇险时，可采用（）设备发送船到岸的报警.

1）MF/DSC

2）HF/DSC

3）2182R/T

4）406S-EPIRB

5）INMARSAT船站

A.1）2）3）

B.2）4）5）

C.2）3）4）

D.3）4）5）