從ABCD四個(gè)選項(xiàng)中選出可以填入空白處的最佳選項(xiàng)) 1. It is believed that_____ apple a day keeps the doctor away. A. 不填 B. the C. an D. a 2. Medicines ______be put out of the reach of children. A. can B. may C. need D. must
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