yesterday i bought a book.the book is really hard to understand(合并为一句)
yesterday i bought a book.the book is really hard to understand(合并为一句)
yesterday i bought a book______ _______ really hard to understand
yesterday i bought a book______ _______ really hard to understand
英语人气:783 ℃时间:2020-03-24 17:32:27
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which is
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