1.这是个快乐的周末
This is a happy weekend.
2.上海是我的家乡
Shanghai is my hometown.
3.许多年前在我家乡有许多又小又危险的房子
Many years ago,there were a lot of small and dangerous houses in my hometown.
4.现在它是个现代漂亮的城市
Now it's a modern and beautiful city.
5.现在有许多现代高楼代替（instead）
Now there are many modern high buildings instead.