【题目】 The boy decided to climb the mountains _______ he knew he would face many difficulties.
A. as though B. unless C. even though D. even
在线课程【答案】C
【解析】
试题分析：考查副词。句意：这个男孩决定去爬山虽然他知道他会遇到很多困难。 A. as though 好像；B. unless 除非；C. even though 虽然；D. even 甚至。根据句意可知选C。