◎ 题干
My sister _____ the League last month and she has decided to _____ the activity to help the aged next week.
[     ]
A. joined; join in
B. joined in; join
C. joined; join
D. joined in; join in
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“My sister _____the League last month and she has decided to _____the activity to help the aged next week. [ ]A. joined; join in B. joined in; join C. joine…”主要考查了你对  【动词短语】  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。