补全对话 根据上下文把下面的对话补充完整。

A: Summer holiday is coming小题1: _________________________________.

B: Yes, I’m going to my hometown?

A:小题2:_________________________________?

B: For about a month. 小题3:_________________________________?

A: I want to travel to Hainan Island. It’s a beautiful place of interest.

B:小题4:_________________________________. But I have to visit my grandparents in my hometown.

A: It doesn’t matter. If you stay in your hometown for fewer days, you’ll have enough time to go traveling.

B:小题5: _________________________________. Then I will go to my hometown as soon as the holiday begins.

A: OK! I will wait for you until you come back.

B. That’s a deal! Thank you.

启动发电机用于（）和高速船用柴油机及小型汽油机。

A.工程机构

B.农业机械

C.机车

D.小型船舶