Fossil fuels will be exhausted within a ___relatively__ short time. (relate)

Increased consumption will lead to faster __exhaustion____ of our natural resources. (exhaust)

Solar energy is not only plentiful and __infinite_____ but also clean and safe. (finite)

It is an occasion when ___strength__ and sports skills are tested. (strong)

Their efforts were much __appreciated___ when they won 2 gold medals. (appreciate)

The Vietnamese participants always take part in this event with great __enthusiasm___. (enthusiastically)

Tim likes ____athletics__ and aquatic sports. (athlete)

1. relatively

2. exhaustion

3. unlimited = infinite : nhiều, dồi dào

4.  strength

5. appreciated

6. enthusiasm

7. athletics

#NOCOPY