| 1. 难度：中等 | |
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–Who’s______ woman in red over there? -To Youyou, ______ excellent scientist in our country. A. a; / B. a; the C. / ; the D. the; an
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| 2. 难度：中等 | |
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A number of foreign visitors ______ Chengdu many times because it is such a beautiful city. A. have been to B. has been to C. has gone to D. have gone to
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