—What is a writing brush do you know?—It’s used writing and drawing.A. withB. toC. forD.

问题补充：

—What is a writing brush, do you know?

—It’s used writing and drawing.

A. with

B. to

C. for

D. by

答案：

A. with

B. to

(答案→)C. for

D. by

解析：with表示伴随，用某种工具等意思，by表示通过某种方式，to和for都可以表示目的对象，但是to后一般接动词构成不定式，for后面接名词或动名词。根据题意它是用来写和画的，选C。