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