1.Last time I went bake to my hometown a big shop______。
A.was being built B.has been built.
2.Who was 'Red Star Over China'______.( 这句话句型我有点忘了,讲解一下~)
A. written B. written by
3.By the end of last year,ten schools _____ set up in the area.
A. has been B. had been
【选择题】 我这里只打出2个选项,希望能解释一下这两个选项的区别,有详细的解析,谢谢~
4.When and where to build the new hospital hasn't been decided yet.
(这句话中为什么不用haven't?是把When and where to build the new hospital 这个看成是一个主语从句就用单数吗?)