问题描述：
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.
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.
问题解答：
我来补答展开全文阅读