The ( ) often help us with the machine.(engine)适当形式.
人气:291 ℃ 时间:2019-10-31 09:13:31
解答
engineer
工程师书上是engineers是不是都可以?没 ,要加个s后面的help是原型我没注意 - - engineers 要复数形式。 抱歉为什么要复数形式,我觉得好像都可以。知道了是动词如果是单数的话, 后面得help 就要用helps
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