题目内容
20、 life began on the earth is one of the biggest puzzles to scientists.
A．How B．What C．Where D．That
试题答案
20、A
life began on the earth is one of the biggest puzzles to scientists.
A．How B．What C．Where D．That
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______life began on the earth is one of the biggest puzzles to scientists.
A．How B．What C．Where D．That
查看习题详情和答案>>______life began on the earth is one of the biggest puzzles to scientists.
A．How B．What C．Where D．That
查看习题详情和答案>>26．______life began on the earth is one of the biggest puzzles to scientists.
A．How B．What C．Where D．That
查看习题详情和答案>>life began on the earth is one of the biggest puzzles to scientists.
A．How B．What C．Where D．That
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26．______life began on the earth is one of the biggest puzzles to scientists.
| A．How | B．What | C．Where | D．That |
______life began on the earth is one of the biggest puzzles to scientists.
| A．How | B．What | C．Where | D．That |
．_________life began on the earth is one of the biggest puzzles to scientists.
A．How B．What C．Where D．That
查看习题详情和答案>>
．_________life began on the earth is one of the biggest puzzles to scientists.
A．How B．What C．Where D．That
查看习题详情和答案>>
．_________life began on the earth is one of the biggest puzzles to scientists.
| A．How | B．What | C．Where | D．That |