1.Youngsters who suffer the academic burden are encouraged to take         up       a sport and lead an active life.

2.Thanksgiving, an annual holiday in the US dating         from       hundreds of years ago, falls on the fourth Thursday in November.

3.He is very        ambitious       £¨ambition£©and well-qualified, so he should reach the top of his profession.

4.A healthy lifestyle is often considered to be associated         with      exercise, the mood and diet.

5.We haven’t been able to be outdoors for so long      that   we’ve grown so crazy about everything to do with nature.