SOLAR ENERGY IS NOT ONLY PLENTIFUL AND INFINITE BUT ALSO CLEAN AND...

15. - KIEM TRA 24 TUAN
Tiếng Anh KIEM TRA 24 TUAN
15.

Solar energy is not only plentiful and infinite but also clean and safe.

a. boundless

b. unlimited

c. uncountable

d. inflexible

V. Give the correct form of the word in brackets (1 mark).