The days__you could travel without a passport are gone

The days__you could travel without a passport are gone The days ___ you could travel without a passport are a thing The days ______ you could travel without a passport are a th The days in which you could travel without a passport are a 英语的一道选择题 The days____you could travel without a passport are We can't travel abroad without taking a passport.To travel a you could travel the 一Could I get the passport in 20 days? The days are gone when women could be referred to as the wea Gone are the days when women could be refered to the weak.请问 gone are the days Passport/Travel Document Number 是什么