Câu hỏi: The business was acquired from Orion four years ago.

A. before

B. later

C. ahead

D. last

Câu 1: There is growing concern about the way man has destroyed the environment.

A. attraction

B. worry

C. disinterest

D. careless

Câu 2: At times, this can be risky, and the keepers have been injured and one has been killed.

A. good

B. useful

C. healthy

D. secure

Câu 3: We know not what is good until we have lost it.

A. find

B. count

C. guess

D. learn

Câu 4: It is easy to open a shop but hard to keep it always open.

A. welcome

B. appear

C. switch

D. close

Câu 5: The wise man has long ears and a short tongue.

A. short

B. prolonged

C. high

D. crooked

Câu 6: Use water sparingly and keep water clean.

A. dusty

B. dirty

C. wicked

D. halfway