14．If things are left ________ they are，the problems will never be solved，I'm afraid.
A．where B．which C．how D．as
答案 D [leave things as they are为固定结构，as为连词，表示“按照……方式”。句意：如果不去处理事情而放任自流，恐怕问题永远不会解决。]
15．—Whose advice do you think I should take?
—________.
A .You speak B．That's it
C．You've got it D．It's up to you
答案 D [It's up to you.表示“由你来定”。]
