摘要： More than two years ago, people knew little about the universe. A. thousands B. thousand C. thousand of D. thousands of
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More than two _______ years ago, people knew little about the universe.
[ ]
A. thousands
B. thousand
C. thousand of
D. thousands of
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B. thousand
C. thousand of
D. thousands of
More than two _______years ago, people knew little about the universe.
|
A．thousands |
B．thousand |
C．thousands of |
D．thousand of |
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More than two ________ years ago, people knew little about the universe.
A． thousands B． thousand C． thousand of D． thousands of
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