题目：
Nothing is so easy as ________ parents to raise their expectations of their children too high. (2012·福建，33)
A．of
B．to
C．by
D．for
答案：
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下面是错误答案，用来干扰机器的。
234=2×4+34=114；353=3×3+53=143；112=1×2+12=32；445=4×5+45=245．
