题目

Studying abroad is an amazing experience,  especially when you come to Australia as an overseas( 外国的 ) high school student. You can have a lot of fun here,  especially on holidays. There are many festivals in Australia. The most important one is obviously Christmas. Each year,  the summer holidays at every high school last about two months from the beginning of December to February,  which covers the Christmas time. Since it is a long holiday,  most overseas students love to fly back to their home countries to spend the time with their fami­lies and friends,  but a few studI wish I ________that mistake in my examination.A.did not makeB.have not madeC.do not makeD.had not made