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题目内容
（河南城建学院大学英语（二））
The simple device, possibly with a screen but no keyboard, can be put to use ___________.
A. within fifty years B. fifty years later
C. in the next five to ten years D. within the next five years
A. within fifty years B. fifty years later
C. in the next five to ten years D. within the next five years
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