If everybody wants to widen he makes the ability of exercises, can choose more a few, the exercises at the back of all reference book is done.

如果大家想拓宽自己做习题的能力，可以多选择一些，所有参考书后面的习题都做一下。

youdao

If everybody wants to widen he makes the ability of exercises, can choose more a few, the exercises at the back of all reference book is done.

如果大家想拓宽自己做习题的能力，可以多选择一些，所有参考书后面的习题都做一下。

youdao