题目

Mr. John is a blind man, so wherever he goes, his guide dog will take him there. A . can't see B . can't hear C . can't sing 答案：A----I missed the first part of the film. It was really a pity．----You _____home half an hour earlier.A. should have left　　　　　　　 B. must have leftC. should leave　　　　　　　　 D. must leave