YOU MUST NEVER TAKE THE HELMET OFF WHEN YOU DRIVE. A. WEARING HELMETS...

Câu 19: You must never take the helmet off when you drive.

A. Wearing helmets is never taken into consideration when driving.

B. Helmets are an optional part of you when you drive.

C. Helmets must be worn at all times when driving.

D. Helmets must be taken around with you when you drive.