第5题: [单项选择]The bank clerk listened carefully ______ he could discover exactly what the client wanted. A. in case that B. now that C. so that D. provided that 参考答案:C 答案解析:[解析] 本题考查状语从句的引导词。根据空格前后的内容,判断空格处应为目的状语从句的引导词。在四个选项中,选项A和选项C均可引导目的状语从句,但选项A意为“以防”,不符合本题句意。故正确答案为选项C。