摘要： The sunspot came into its active stage, that happens once every eleven years. A. one B. it C. the one D. what
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The sunspot came into its active stage, ____ that happens once every eleven years.
A. one B. it C. the one D. what
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The sunspot came into its active stage, __________ that happens once every eleven years.
A．one B．it C．the one D．what
查看习题详情和答案>>
The sunspot came into its active stage, ________ that happens once every eleven years．
[ ]
A．one
B．it
C．the one
D．what