Câu hỏi: Solar energy is not only plentiful but also infinite.

A. without limit

B. boundless

C. limited

D. indefinite

Câu 1: With her sophiscated tastes, the singer has become an omnipresent icon of style and beauty.

A. oblivious

B. controversial

C. ubiquitous

D. unknown

Câu 2: In some Asian coutries, it is customary for people to worship their ancestors.

A. fossils

B. elders

C. heirs

D. forefathers

Câu 3: Strongly advocating health foods, Jane doesn’t eat any chocolate.

A. supporting

B. impugning

C. advising

D. denying

Câu 4: My cousin tends to look on the bright side in any circumstance.

A. be optimistic

B. be pessimistic

C. be confident

D. be smart

Câu 5: Population growth rates vary among regions and even among countries within the same region.

A. restrain

B. stay unchanged

C. remain unstable

D. fluctuate

Câu 6: The works of such men as the English philosophers John Locke and Thomas Hobbes helped pave the way for academic freedom in the modern sense.

A. terminate

B. prevent

C. initiate

D. lighten