摘要： It was the A/N1H1 epidemic spread almost throughout the country promoted the research and production of the flu vaccine. A. that-that B. that-which C. what-that D. that-what
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It was the A/N1H1 epidemic ____ spread almost throughout the country ____ promoted the research and production of the flu vaccine.
A. that…that B. that…which C. what…that D. that…what
查看习题详情和答案>>It was the A/N1H1 epidemic ____ spread almost throughout the country ____ promoted the research and production of the flu vaccine.
A．that…that B．that…which C．what…that D．that…what
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