题目内容
（请给出正确答案）
[单选题]
这家工厂的生产质量得到明显的提高。
A.They have greatly improved the quality of production in this factory.
B.The quality of production of this factory has been greatly improved.
C.Great improvement has been made in the production quality of the factory.
D.Great improvement has made in the production quality of the factory.
答案
They have greatly improved the quality of production in this factory.;The quality of production of this factory has been greatly improved.;Great improvement has been made in the production quality of the factory.
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