He wrote a book about his travels in South Africa.
此处travel为何复数，travel单复数区别。
Come up 词组用作 提出问题 可以吗？ （come up a question）
I want to read the book a third time before returning it to Tom .
为何third前使用a而非the。
Mary’s hair is the same color as her mother’s.
此处is是否有错，改为has是否恰当？
...,from pulling my own hair to hurting myself.
此处为何hurt为-ing?
Math 与 Maths 是否相同？
Laziness is the thief of time ,for it does not only bring us failure but also us other harm.
（A.brings B.does C.takes D.sends)
哪一个是对的？为什么？