过了很长时间,他才完成这本书的写作.（it）关键字为it,句子中要用it这个单词.是写作，
问题描述：
过了很长时间,他才完成这本书的写作.（it）
关键字为it,句子中要用it这个单词.
是写作，
答
It takes him a long time to finish his homework
答
It took him a long time to finish writing this book.
答
It was after a long period of time that he finished writing the book.
答
it took him a long time to finish the writing of this book
上海灵格风英语