How do you say this in English (US)? "What is the letter (that) Toby didn't write?" does it make sense?

22 Oct 2018

Native language
Korean
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Question about English (US)
How do you say this in English (US)? "What is the letter (that) Toby didn't write?" does it make sense?

Native language
English (US)

Native language
Korean

Native language
English (US)

Native language
Korean
0