In the activity, a few hours of “disability” gave us only a taste of the _______ both physically and mentally the disabled people should overcome.

 Jumping out of ___ airplane at a height of 5000 kilometers is ___ unforgettable experience.           

．To deal with the global financial crisis, China ______ the international community to help developing countries．

After the________ journey from Jiuzhaigou, Tom returned home, ________ .

Bears ________ fat stores throughout the summer and fall to have energy enough to last them through their winter sleep.