问题
选择题
When the millionaire was young, he was very poor. Only by doing parttime jobs during the summer holiday ________ afford to pay his college fees.
A．he could
B．could he
C．can he
D．he can
答案
答案：B
选B 考查倒装和时态。句意：当这位百万富翁年轻的时候，他非常穷。只有在暑假做兼职工作他才能付得起大学的学费。“only＋状语”置于句首时，句子应用部分倒装，此处说的是过去的事情，故选B。