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

A. welcome

B. appear

C. switch

D. close

Câu 1: Use water sparingly and keep water clean.

A. dusty

B. dirty

C. wicked

D. halfway

Câu 2: They don't seem particularly worried about the situation.

A. concerned

B. pleased

C. frightened

D. excited

Câu 3: The wise man has long ears and a short tongue.

A. short

B. prolonged

C. high

D. crooked

Câu 4: Keep only fish that you will eat; release the rest.

A. catch

B. hold

C. take

D. have

Câu 5: We know not what is good until we have lost it.

A. find

B. count

C. guess

D. learn

Câu 6: It's cool and quiet everywhere except in the kitchen.

A. windy

B. freezing

C. cold

D. hot