英语SAT语法题(Identifying Sentence Errors)题目是这样：Air pollution caused by industrial fumes has been studied for years, but only recently has the harmful effects of noise pollution became known.我的英语老师说是has用错了.应

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英语SAT语法题(Identifying Sentence Errors)题目是这样：Air pollution caused by industrial fumes has been studied for years, but only recently has the harmful effects of noise pollution became known.我的英语老师说是has用错了.应
英语SAT语法题(Identifying Sentence Errors)
题目是这样：Air pollution caused by industrial fumes has been studied for years, but only recently has the harmful effects of noise pollution became known.我的英语老师说是has用错了.应该用have.结果就下课了.这里是不是倒装问题?还请高手指教下.

英语SAT语法题(Identifying Sentence Errors)题目是这样：Air pollution caused by industrial fumes has been studied for years, but only recently has the harmful effects of noise pollution became known.我的英语老师说是has用错了.应
是的,错在后半句,给你回归正常语序：The harmful effects of noise pollution have became known. 主语是effects所以后面用have.
满意请采纳~

英语SAT语法题(Identifying Sentence Errors)题目是这样：Air pollution caused by industrial fumes has been studied for years, but only recently has the harmful effects of noise pollution became known.我的英语老师说是has用错了.应 sat语法题ip Identifying SAT语法几道语法题 SAT语法句子改善题 一道SAT OC 语法题> sat语法, SAT语法. 一道sat的语法题,解释 问2道SAT语法题! 一道sat上的语法题 第19题（sat语法） sat语法题 为什么选D啊 sat语法题 正解b 怎么解 sat语法题,C为什么错了 sat语法题c不好吗? 求SAT历年真题语法解析. SAT试卷英语题.