15. What does the sign mean?

A. you must not use a mobile phone here.

B. you must not use a camera here.

C. if you eat or drink this it will kill you.

D. you must wash your hands.

16. What does the sign mean?

A. you must not use a camera here.

B. you must not use a mobile phone here.

C. you must not turn right.

D. you must wash your hands.