A. It’s a good habits play sports every afternoon.

B. It’s a good habits to play sports every afternoon.

C. It’s a good habit play sports every afternoon.

D. It’s a good habit to play sports every afternoon.

A. laundry      

B. habit      

C. town      

D. planet

A. Are doctor robots more expensive than home ones?

B. Are doctor robots less expensive than home ones?

C. Are home robots as expensive than doctor ones?

D. Are home robots as expensive than doctor ones?

A. cut      

B. cuts      

C. cutting      

D. to cut

A. To go to the movies is not interesting.

B. It’s interesting to go to the movies.

C. It’s interesting going to the movies.

D. Going to the movies isn’t interesting.

A. The height of a teaching robot is 1.5 meters.

B. The weight of a teaching robot is 1.5 meters.

C. The depth of a teaching robot is 1.5 meters.

D. The thickness of a teaching robot is 1.5 meters.

A. cut      

B. lift      

C. water      

D. play