◎ 题干
If I remember correctly, you were supposed _____ the keys on your way here.
[     ]
A. collecting
B. collect
C. to collect
D. collected
◎ 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“If I remember correctly, you were supposed _____ the keys on your way here. [ ]A. collecting B. collect C. to collect D. collected …”主要考查了你对  【不定式】  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。