______ James wanted to go camping with his classmates at the weekend, he had to stay behind to help his mom do the housework.
【正确答案】 B
【答案解析】让步状语从句多由although和though引导,当把让步成分(形容词、副词、动词)置于句首时,此时用连词as或though,而although无此用法,答案为B项Much as。