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

A. windy

B. freezing

C. cold

D. hot

Câu 2: The speaker likes to have an attentive audience.

A. neglecting

B. positive

C. active

D. interested

Câu 3: Use water sparingly and keep water clean.

A. dusty

B. dirty

C. wicked

D. halfway

Câu 4: 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 5: 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 6: We can do something to save the earth.

A. kick

B. shoot

C. throw

D. destroy