情景反应。（每题2分，共10分）
Where does the rain come from? A. It comes from the clouds. B. It comes from the vapour. C. It comes from the water in the river.
Mary’s uncle is _____ doctor, her aunt is ______ artist. A. a , an, B. a, a C an, a
Does she watch TV at night? A. Yes, she do. B. Yes, she does. C. No, he doesn’t.
When are you going? A. I’m going on foot. B. I’m going at 7:30. C. I’m going to school.
________ at a green light. A. Stop B. Wait C. Go
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