He has left his book here on so that you can read it.A. purposeB. intentionC. aimD. mean

问题补充：

He has left his book here on , so that you can read it.

A. purpose

B. intention

C. aim

D. meaning

答案：

(答案→)A. purpose

B. intention

C. aim

D. meaning

解析：on purpose是介词习语，意为“故意地”。如用intention,则应说by intention故意地。