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题目内容
（长安大学-大学英语3）
22.
(2分)A small child has to learn to keep its ____before he can walk far.
A. baggage
B. block
C. border
D. balance
(2分)A small child has to learn to keep its ____before he can walk far.
A. baggage
B. block
C. border
D. balance
参考答案