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第二部分:知识运用(共两节, 满分35分)
第一节单项填空(共15小题;每小题1分,满分15分)
请认真阅读下面各题,从A、B、C、D四个选项中,选出最佳选项,并在答题卡上将该项涂黑。
It is believed that ______ European chemist called Felix Hoffmann first produced ASA which completely changed ______ man’s understanding of aspirin.
A. an; a                        B. the; a                       C. a; /                          D. an; /

科目 英语   题型 单选题   难度 容易
知识点: 冠词的用法辨析
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