—Dad, must we stop and wait when the light turns yellow?—I’m afraid we . It’s necessary to obey the traffic rules.A. need B. must C. may
— do you study for tests?—I study listening to tapes.A. How; with B. What; withC:.How; by D. What; by
Don’t forget ______ the door when you leave.
---What are you doing tomorrow?--- I .
It’s easy ______ English and it’s important ______it.
---When did it start? ---_________.