13

来源：学生作业帮助网编辑：作业帮时间：2024/05/03 22:43:18

13
13

13
9 I spent a week reading two thirds of this book
13 My brother has difficulty in finishing this maths problem

第一个I spent a week reading two thirds of this book
后面那个 My brother has difficulty in finishing this maths problem不知道还对，你自己在检查一下吧

13 13 13, 13, 13 13 13, 13, 13～ 13 13, 13, 13~ 13, 13, 13 13 , 13