问题补充：
He jumped at the opportunity when he saw the advertisement in a newspaper, because barely make ends meet.
A. they could
B. could they
C. they couldn’t
D. shouldn’t they
答案：
A. they could
(答案→)B. could they
C. they couldn’t
D. shouldn’t they
解析：句意：当他在报纸上看到广告的时候他抓住了这个机会，因为他们很少能够收支平衡的。jump at the opportunity抓住机会；make ends meet收支相抵。因为barely几乎不，简直不，是否定副词放在句首，句子用部分倒装，因为它就有否定的含义，所以不再需用not，故排除CD；选项A是正常语序，故排除，所以应选B。.
