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标题: 语法PP的26题 [打印本页]

作者: casualwark11    时间: 2005-7-12 20:55     标题: 语法PP的26题

-------directly with most metals to form componds called carbides

1.carbon reacting,

2.carbon reacts

3.the reaction of carbon

4.when carbon reacting

why 2 not1.


作者: dhhgh11    时间: 2005-7-13 07:27

若选1,句子没有谓语




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