the (r )why I bought this sweater was that it was so cheap.but(s ) these people can't find work or good places to live.but ( b )they move to a big city ,they'd better think about the problems first.根据首字母填空
问题描述：
the (r )why I bought this sweater was that it was so cheap
.but(s ) these people can't find work or good places to live.
but ( b )they move to a big city ,they'd better think about the problems first.根据首字母填空
答