Last summer I took a course on _________.

Last summer I took a course on _________.
A、how dresses to be made
B、how dresses be made
C、how to make dresses
D、how to be made dresses
【正确答案】：C
【题目解析】：本题考查语态。根据句意应该是“怎样制作裙子”。是主动语态，故选C。