问题
选择题
My mum did all she could ___money for my education at that hard time.
A．made
B．makes
C．to make
D．making
答案
答案：C
考查动词不定式。句意为：在艰苦的岁月里，妈妈竭尽全力挣钱供我上学。句中是用动词不定式to make money做目的状语。结合题意，故选C。
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