◎ 题干
To help Tommy learn better, his parents have done             they could: cards, tapes, special learning
centers, in short, everything they can think of.
[     ]
A. both
B. all
C. none
D. neither
◎ 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“To help Tommy learn better, his parents have done they could: cards, tapes, special learning centers, in short, everything they can think of. [ ]A. both B. al…”主要考查了你对  【不定代词】  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。