摘要： Since I came here two years ago, great changes in the factory and many people want to come here to pay a visit. A have been taken place B. had been taken place C. have taken place D. are taking place
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.Since I came here two years ago, great changes __________ in the factory and many people want to come here to pay a visit.
A have been taken place B. had been taken place C. have taken place D. are taking place
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