Hiking by oneself can be _______ and good for health. It may also be good for_______ training.

 — Do you have any plans for this holiday?— To tell you the truth, I have nothing in        for holiday.

 The key to our success was having the courage to take on any job, and then being creative in our _______ to getting it finished.

People who get less than six hours of sleep per night have an increased _____ of dying early．

In order to attract more customers,many supermarkets usually sell their goods at a good     at weekends.