—People ________ wear helmets(头盔)when they ride e-bikes according to the traffic rules.
—Yes. Or they will be punished.
A. |
must |
B. |
can |
C. |
may |
—People ________ wear helmets(头盔)when they ride e-bikes according to the traffic rules.
—Yes. Or they will be punished.
A. |
must |
B. |
can |
C. |
may |