题目

He is pleased to think that he _________ himself on the beach at this time next week.    A. will enjoy                 B. is enjoying                      C. will be enjoying             D. enjoys 答案：C在生物进化过程中，最先登陆的生物是 [　　] A．植物B．原始两栖类 C．脊椎动物D．无脊椎动物