42. (2018河南)Everyone wants to reach the top of the mountain, but all the happiness happens while you _______it.
A. climb        B. climbed  
C. are climbing   D. have climbed
42. C【解析】考查现在进行时。句意：每个人都想到达山顶，但是在你正在爬山的时候所有的愉悦就出现。根据句意可知应用现在进行时，且while引导的从句常用进行时。故选C。