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singing B. are sing C. is singing D. sing2. It’s eight o’clock. The students _____ an English class.A. have B. having C. is having D. are having3. Listen! The baby _____ in the next room. A. crying B. cried C. is crying D. cries4. Look! The twins _____ new sweaters.A. are wearing B. wearing C. are wear D. is wearing5. Don’t talk here. Grandparents _____. A. is sleeping B. are sleeping C. sleeping 6. Tom is a worker. He _____ in a factory. His sisters _____ in a hospital.A. work。 does12. The twins usually _____ milk and bread for breakfast, but Jim _____ some coffee for it.A. have。_____ ____the students ____? Some ____ _____ on the phone, _____ _____ _____ on the beach.2.“格林先生在看電視嗎?” “不, 他在打掃房間。The old man _____ _____ at six o?clock in the morning every day.? Where _____ you from? 或Where _____ you _____ from?我從美國(guó)來(lái)。______ ______ the children ______? They ______ ______ and ______.?不。 ___________________________________。 ____________________________