15. What does the sign mean?

A.        You mustn’t drive after drinking.

B.        You shouldn’t drink after taking medicines.

C.        You must be careful with drunk drivers.

D.        You must drive carefully.

16. What does the sign mean?

A. Accident-prone areas.       

B. Areas with no pedestrians.

C. Pedestrian crossing is not allowed.           

D. Pedestrians must not turn left.