问题补充:
----Why is he feeling down today?
----Because the suggestion he has been turned down.
A. put away
B. put up
C. put down
D. put forward
答案:
A. put away
B. put up
C. put down
(答案→)D. put forward
解析:A. put away收好,储存,B. put up竖立,张贴,C. put down 放下,记下,D. put forward提出,句意:--为什么他今天感觉沮丧?--因为他提出的建议被拒绝了。根据句意选D.