is known to everybody, the moon travels round the earth once every month. [ ] A．
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________ is known to everybody, the moon travels round the earth once every month.
[]
A．ItB．AsC．ThatD．What
试题答案
答案：D
________ is known to everybody, the moon travels round the earth once every month.
[]
A．ItB．AsC．ThatD．What
答案：D