____ ____ his arm, he wrote a book.After he lost his arm,he wrote a book(改同义句）

After losing his arm,he wrote a book.
after作介词,动词要用不定式.The writer tells of being in c_______ of one's life按首字母填空The writer tells of being in cities of one's life。应该是，不确定。The writer tells of being in cities of one's life。应该是，不确定。