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黄冈二轮语法和词汇知识 Ex. 1 1. Swan Lake is a famous ballet in four acts, on a German fairy tale. ( ) A. basing B. based C. bases D. to base 2. He had made a mistake, but when he realized it, he took measures against the possible loss it was too late. ( ) A. until B. when C. before D. as 3. Throughout __ history man has had to accept fact that all living things must die. ( ) A. the; the B. a; a C.不填；the D. 不填；不填 4. He wrote to me, he would drop in on me the next week while he was out on business. ( ) A. to say B. and saying C. said D. saying 5." Beijing its best air quality in the first six months of last year. ( ) A. saw B. sees C. had seen | 
