Câu hỏi: 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 1: Be quiet or you'll wake the whole house!

A. still

B. noisy

C. peaceful

D. tranquil

Câu 2: We know not what is good until we have lost it.

A. find

B. count

C. guess

D. learn

Câu 3: As long as you are still alive, you will definitely encounter the good things in life.

A. well

B. surviving

C. sick

D. dead

Câu 4: It's too far to ride to your grandmother's; you'd better take the bus.

A. remote

B. near

C. fast

D. besides

Câu 5: It's cool and quiet everywhere except in the kitchen.

A. windy

B. freezing

C. cold

D. hot

Câu 6: The wise man has long ears and a short tongue.

A. short

B. prolonged

C. high

D. crooked