Choose the suitable words to complete the meanings of the traffic signs.

Choose the correct option.

A. A prohibitory sign (it prohibits you to do something).

You [can|can't] drive at a speed over 50 mph.
B. A warning sign (it warns you about something).

Rocks [can|will] fall onto your car.
C. A mandatory sign (it shows what you must do).

You [can't|must] turn right.
D. An informative sign (it gives you some information).

You [can't|will] find a telephone.