题目内容
The reason for his return is ______ he forgot his file folder.
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Professor lee's book will show you_______ can be used in other context.
Obviously they didn;t see the significance of the plan. That's _____ the problems was.
Much to the parents' cofort, their income is now double ______ it was ten years ago.
You should repect others' opinions, and at the same time ou should insist on _____ you believe is right.
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