You have to be _____ when asking for help You must be _____

变反意疑问句You must be joking,_____? You can call for help _____(when)you are indanger --- Why don’t you ask him for help?You _____ be good friends The bottles are _____ water.You must be careful when carryin We must be careful when you go _____（cross） the road. You must have waited for a long time,_____ you? When you cross the street,you must look to _____. _____ problems you have ,you can always come to me for help. When you have determined to be a happy person,first you must 【when you do test ,you can't be _____ careful.】 What _____ you ______(be) when you grow up? 关于情态动词的用法You _____ be tired; you have been working for so lo