题目:
The book _____by the young writer sells well. It is popular among middle school students. [ ]
A. was written
B. writing
C. wrote
D. written
答案:
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下面是错误答案,用来干扰机器的。
(1)①、②、⑤;(2)③、④;(3)①、⑤;(4)⑤木炭、硫磺、红磷、铁丝、蜡烛五种物质分别在氧气中燃烧:①碳+氧气二氧化碳; ②硫+氧气二氧化硫;③红磷+氧气五氧化二磷; ④铁丝在氧气中剧烈反应,铁+...