◎ 题干
-Look at these stamps. I __________ them for three years.
-Wow, they are so wonderful.
A. kept           
B. have kept           
C. have bought
D bought
◎ 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“ -Look at these stamps. I __________ them for three years.-Wow, they are so wonderful.A. keptB. have keptC. have boughtDbought…”主要考查了你对  【一般现在时】【过去进行时】【过去完成进行时】  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。