题目

-- Look! The man at the gate _____ be our headmaster. He is always standing there every morning.    --No, it _____ be him. He is holding a meeting in the office now. A. must, can’t     B. must, mustn’t     C. can’t, can’t     D. can’t, mustn’t 答案：A— There are so many nice coats. Could you tell me __ ___?— The red one.A. the choose which one B. which to choose oneC. which one to choose D. choose which one