You must be the reason i'm alive

do you think tobacco industry should be banned or encouraged give your reas you must be ____(care)when you cross the street. you must be careful when you （ ）the street You must be strong . you must be You must be hungry You must be joking You must be confident. You must be dreaming you must be careful You must be the driver等于Must be your driver吗 The girl,you must be strong ,don't cry You must be careful when crossing the street.改为祈使句 You must be polite to the elder.(改为祈使句） You must be t__ after the hard work补充 You must be polite to the elder.改为祈使句 while___(cross)the street,you must be careful You must be the reason i'm alive