When the millionaire was young he was very poor. Only by doing part­time jobs during

问题补充：

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：

A. he could

(答案→)B. could he

C. can he

D. he can

解析：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。

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