七上英语You ( ) use mobile phones at the gas stationA.can B.may

七上英语
You ( ) use mobile phones at the gas station
A.can B.may C.needn't D.can't
选择正确形式并用适当形式填空，有两项多余 must have to find look for
——（ ）I wait for you？
——No，you needn't
Do you （ ）the answer to the question