Many people are taking part in various outdoor activities ______themselves.

Millions of people watched that first moon landing on television, their hearts in their mouths, aware of how difficult and dangerous an adventure it was, and what risks had to be ____. 

Sichuan Province, ________ in southwest China and ________ an area of 485,000 kilometers with the largest population in China, is one of the largest and most inaccessible provinces in China.

---He admitted __________in the examination. ----That’s why he was not admitted _____ universities. 

 —What made little Tony so unhappy and cry in his room?— ______ to go hiking with his brother.