【题目】Nothing is so easy as ________ parents to raise their expectations of their children too high.
A.of
B.to
C.by
D.for

【答案】D
【解析】句意：对父母而言，没有什么能比把对孩子的期望值提得太高再简单的事情了。本题把介词短语置于句中提高了试题的难度，实际上就是For parents nothing is so easy as...。for parents对父母来说。选D。