◎ 题干
They _____ in a factory now, but they _____ there a year ago.
[     ]
A. works; not worked
B. work; didn't work
C. works; isn't working
D. is working; works
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“They _____ in a factory now, but they _____ there a year ago.[ ]A. works; not worked B. work; didn't work C. works; isn't working D. is working; works…”主要考查了你对  【一般现在时】【一般过去时】【主谓一致】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。