题干
------ How’s your tour around the North Lake? Is it beautiful?
------ It _______ be, but it is now heavily polluted.
------ It _______ be, but it is now heavily polluted.
A：will
B：should
C：would
D：must
答案(点此获取答案解析）
B
的图象，只要将函数
的图象（ ）