题目

--Listen! Kate is playing the piano in the next room.--It _______________be Kate. She has gone to Hangzhou to visit the Cross-sea Bridge.A. needn'tB. mustn'tC. can't D. shalln't 答案：CFacing the _____ situation the sales manager looked _____. [　　] A．puzzling; puzzled　　　　　　B．puzzling; puzzling C．puzzled; puzzled　　　　　　D．puzzled; puzzling