51.Stand up.
52.No,they don't.
53.No,they can't.
54.Yes,they do.
55.They can use their personal computers in dormitory house.
我不太确定。
They should stand up.
No,they do not.
No,they can not.
Yes,they do.
Their dormitory house.
哦，你在电脑上查找答案就行，只要写前一段
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