◎ 题干
Not until one of his works was published_________to gain his confidence in writing.
[     ]
A. he was able      
B. was he able        
C. he had been able  
D. had he been able
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“Not until one of his works was published_________to gain his confidence in writing. [ ]A. he was ableB. was he ableC. he had been able D. had he been able…”主要考查了你对  【一般过去时】【部分倒装】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。