15. What does the sign mean?

A. You cannot go straight.     

B. You can go at the speed of 60 km/h.

C. You aren’t allowed to turn around.

D. You should be careful due to the crowd ahead.

16. What does the sign mean?

A. There are obstacles ahead.

B. You can turn left at the T-junction.

C. There’s a hospital nearby.

D. No horns at night.