You can find many others on the Internet, or write your own.
你可以在互联网上找到很多，或干脆自己写。
Write your own letters on a computer.
直接在电脑上撰写信函。
Do write the problems up on your own, however.
但是这些问题必须自己写。
We do expect you to write down your solutions on your own, however.
但我们确实期望作业是你自己写的。
We do expect you to write down your solutions on your own, however.
但我们确实期望作业是你自己写的。
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