问题描述：
We are going to keep our money in a ________.
John went to ________ at the age of seven.
Is he making a call over the ________?
Our guests are having a rest at Great Wall _________.
John went to ________ at the age of seven.
Is he making a call over the ________?
Our guests are having a rest at Great Wall _________.
问题解答：
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