5、May I watch TV for a while?-No, you _______. You have to finish your homework first.A. shouldn’t B. needn’tC. mustn’t D. won’t四、shall/shouldshall用于第一人称,征求对方的意见。ShallIopenthewindow?ShallIcleantheroomforyou?should表示“应该”,常用来表示劝告、建议;认为“某人应该做某事”或“有义务责任做某事”。Weshouldobeytrafficlaws.Youshouldn