(¡¡¡¡)21. The greatest gifts in life are not purchased, but ________ through hard work and determination.

¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡

A. acquired  B. arranged  C. adored  D. allocated

(¡¡¡¡)22. ________ the path of a country is the right one is a matter to be decided by its people.

A. That  B. What  C. Whether  D. Why

(¡¡¡¡)23. Thousands of fires have broken out in Brazil, ________ much of the rainforest.

A. having endangered  B. endangers

C. endangered  D. endangering