作业帮It's not easy_____________(write)a business letter
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It's not easy_____________(write)a business letter
It's not easy_____________(write)a business letter
It's not easy_____________(write)a business letter
It's not easy to write (write)a business letter.
it's +形容词+不定式为固定结构...
to write
it+is+形容词+to do sth