The survivors of the crashed plane had no food or water and were________the extreme cold weather.[ ]

A．in the possession of  

B．in the charge of

C．at the mercy of  

D．at the risk of

根据所给中文完成句子翻译（共5小题，每小题2分，满分10分）

小题1: 你们是如何保持联系的呢?

How do you _______________________each other?

小题2:现在我时而不时地会感到有点孤独.

Now I feel _________lonely _________________________.

小题3: 我跟着他们跑,忍不住一直拍照片.

I ____________________them and ____________________..

小题4:我爸爸去北京出差过两次.

My dad ______________________Beijing __________________twice.

小题5: 我们花了三个半小时飞到香港.

It took us about ____________________hours _______________HongKong.