e? — They are having fun ____________ in the river. A. swim B. to swim C .swimming D. Swims ( )18. We didn ’t leave the supermarket ____________ the rain stopped. A. after B. unless C. until D. While ( )19. _______they heard the news, they all jumped around happily. A. Even though B. Because C. Before D. As soon as () 20 .Millie _____________ a picture when Mr. Green came in. A. draw B. will draw C. drew D. was drawing 二.用正确的形式填空。 1.We had great fun___________ ( explore ) the National Museum yesterday. 2.The visitors are all__________ ( surprise ) at the beautiful scenery( 景象). 3.The man is so ____________ ( worry ) about his son ’s illness. 4.The children couldn ’t help____________ ( talk ) after the teacher went out. 5. The boys are busy ____________ ( prepare ) for their football match.
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