问题
                    
1-May we start the meeting now-No, we________. We__________to start until the manager comes.
                            A: mustn’t; are allowed
B: don’t have to; are supposed
C:needn’t; aren’t allowed
D: can’t; aren’t supposed
                        
                        B: don’t have to; are supposed
C:needn’t; aren’t allowed
D: can’t; aren’t supposed
正确答案是:
                        