问题补充：
—Why is he feeling down today?
—Because the suggestion hehas 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：考查词组辨析：A．put away收好B．put up竖起，张贴C．put down放下，记下，D．put forward提出，句意是：--为什么他今天情绪很低落？--因为他提出的建议被拒绝了。选D
