Exercise 11.1. Complete the following situations using this, that, these and those.1. Have you ever been to London? Many years ago, but ___ was one of the best holidays I've ever had 2. What's your new TV-set like? ___one is much better than my old one. 3. Look! ___ trousers cost £50! But they're very nice. Hello, Bill, ____ is Liz, my new room-mate. Hello Liz, pleased to meet you. 5. I remember when that dictionary cost thirty pence.Ah, ___ were the days my friend !