摘要：(1)The letter “X can an unknown number. A. be used to express B. be used to expressing C. use to express D. use for expressing (2)Johnson up now. A. used to get B. is used to getting C. is used to get D. used to getting
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The letter “X” can _______ an unknown number
A be used to express B be used to expressing
C use to express D use for expressing
查看习题详情和答案>>The letter“X”can ________ an unknown number．
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A．be used to express
B．be used to expressing
C．use to express
D．use for expressing