Try on this red skirt; you will look great it..
A. on B. by C. in D. for

Try on this red skirt; you will look great it..
A. on B. by C. in D. for
C。
解析:考查介词的用法。Sth. Be on sb. “衣服穿在某人身上”;sb be in sth”某人穿着什么衣服”。由此可知答案为:C。