共50条信息
“天哪，”我大声说，“重力改变了，看来走路也的确需要练一练了。”
“Oh dear,” I cried, “walking _________ need a bit of practice ___________ __________ gravity has changed.”
——The room is in a mess again!
——Sorry. It is ______ who ______.
It was on Tuesday evening ___ I finished the experiment.
It was along theMississippi River_____ Mark Twain spent much of his childhood.
It was in the classroom ______ I found my keys.
It was his aunt that _____________ _______________ ______________.
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