第一节 完形填空(共10小题；每小题2分，满分20分) 阅读下面短文，掌握其大意，然后从21-30各题所给的a、b、c和d项中，选出最佳选项。 when my mother took me out of high school, i knew that my life would become difficult. my mother told me when i was 18 i had to leave the 21 . as i was going to 22 my 18th birthday, i started feeling 23 because i didn’t have an idea on what i was going to do. one night while i was watching tv, an advertisement came on about 24 the military（军队）.
