问题补充：
He jumped at the opportunity when he saw the advertisement in a newspaper，because barely make ends meet.
A. he could
B. could he
C. he couldn
D. couldn he
答案：
A. he could
(答案→)B. could he
C. he couldn
D. couldn he
解析：句意：因为入不敷出，当他在报纸上看到这则广告时抓住了机会。否定副词barely位于句首时句子要进行部分倒装，将助动词、情态动词或系动词be等置于主语前，再结合句意可知，选择B项。
