【题目】There’s no doubt ______ hard work is the key to _____ your result.
A. whether; improving B. that; improving
C. whether; improve D. that; improve
在线课程【答案】B
【解析】
考查固定句式和固定搭配。句意：毫无疑问，努力工作是提高成绩的关键。固定句式：There’s no doubt that---“毫无疑问”； the key to doing sth.“做某事的关键”。故选B。