THOSE WHO ARE RIDING A MOTORBIKE ARE NOT ALLOWED TO TAKE OFF THEIR...

28.

Those who are riding a motorbike are not allowed to take off their helmet.

A. Those who are wearing a helmet are not allowed to ride a motorbike.

B. It is the helmet that one needn't wear when he is riding a motorbike

C. You should not wear a helmet when you are riding a motorbike.

D. People must never take their helmet off while they are riding a motorbike.

Mark the letter A, B, C or D on your answer sheet to indicate the sentence that best combines each pair

of sentences in the following questions.