After the new technique was introduced,the factory produced ___ tractors in 1988 as the year before. A、as twice many B、as twice much C、twice as many D、twice as much

After the new technique was introduced,the factory produced ___ tractors in 1988 as the year before.
A、as twice many
B、as twice much
C、twice as many
D、twice as much

出自：南京工程学院教育英语

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