单选题  I＇m afraid I didn＇t                        you.Could you repeat your words?

单选题 I have lost my pen, so I                       buy one.

单选题 （2020·建湖二模）When you ride your e-bike, for your safety, I think you                    wear the helmet.

单选题 They are going to go              the hill after planting trees.

单选题 （2020·无锡惠山区模拟）

-Dad，must we wait until the light becomes green?

-Yes,I'm afraid we                     .That's the traffic rule.

单选题 After reading English, I went on             maths exercises.

单选题 You                  do as you are told.

单选题 Please                be late next time.