WashingtonD.C(华盛顿)is ____of America. A. a capital B. capital C. the capital D. an capital
--- Jenny, ________do you visit your grandparents? --- Twice a month.
---Do your two children live in Beijing with you? --- _______. One is in Shanghai, the other is in Tianjin.
— Is that Jack speaking? —Sorry, he isn’t here. He ________the cinema with his aunt.
Don’t put your hand out of the car window, ______ you will be hurt by the passing traffic.
---Must I work out the problem right now? ---Yes, you _______. It’s very serious.