问题
单项选择题
His ideas are invariably condemned as () by his colleagues.
A. imaginative
B. ingenious
C. impractical
D. theoretical
答案
参考答案：C
解析：
从空前的“condemn”(谴责)可知此处应为impractical(不切实际的)，如：Refloating the sunken ship proved impractical because of the great expense．打捞沉船由于费用巨大而显得不切实际。