一道英语选择题A lot of buildings _____ and the place _____ very noi
一道英语选择题 A lot of buildings _____ and the place _____ very noisy ever since we moved here. A. have been built; has become B. have been built; became C. were built; has become D.were built; became 答案是A 第二个空格不明白,从句“since we moved here”它前面不应该是过去完成时吗?更不能理解的是它的“become”居然是原型的.到底是为什么呀?