— Will you take D5581 or G7619 to Hangzhou? — G7619. I will have to more money, but it will much less time.
They waited and waited, and_____ he came back.
---It was ___________ who helped us out of danger. ---What brave and helpful children! We should learn from them.
My mother was doing the cleaning in the sitting room ________ the telephone rang.
Every day, too much water _______ in our school. We should save it.
— Must we go to see a doctor at once when we have the flu? —No,_____. A. we mustn’t B. we shouldn’t C. we don’t have to