Mark Twain wrote about the _____people because he knew them well and their life was the one he himself had lived.
A.lower-class B.middle-class C.upper-middle-class D.upper-class正确答案A
Mark Twain wrote about the _____people because he knew them well and their life was the one he himself had lived.
A.lower-class B.middle-class C.upper-middle-class D.upper-class正确答案A