◎ 题干
The old man            lonely at all since we began to visit him once a week.      
[     ]
A. hasn't felt        
B. don't feel          
C. didn't feel        
D. haven't felt
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“The old manlonely at all since we began to visit him once a week. [ ]A. hasn't feltB. don't feelC. didn't feel D. haven't felt…”主要考查了你对  【现在完成时】【主谓一致】  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。