Finish the first and zero conditional sentences. If you behave like that, ...
I’ll accept your invitation if ...
If you haven’t got any more questions, ...
Lock the front door if ...
If you can’t come to the meeting on time, ...
There will be a lot of problems if ...
If you want the children to be quiet, ...

1) It is made of glass and is used mainly used by old people, when they are reading or writing. Glasses.
2) It is made of wood, plastic or metal and is used to draw a straight line. A ruler.
3) It is made of cream and sugar and should be stored in the refrigerator. It is chocolate, vanilla, strawberry. All the kids love it. Ice-cream.
4) This item is made of metal and helps us to open the door. A key.
5) This item is made of leather, it is used by business people, business papers are caried in it. A case.
6) It is made of paper and is used for writing. A note-book.

I think it is impossible to live in our modern word without travelling because there are many interesting places to visit and see. Railway and bus stations, airports and seaport are busier in summer than in other seasons of a year because of school holidays. Travelling is the best way of spending holidays because you can visit different interesting places in your country and abroad. I prefer to travel by train because I like to look out of the  window and watch the nature and a lot of small towns and villages. Of course, I usually travel with my parents because I am a teenager and my parents don’t allow me to travel by myself. I have already been in Moscow, Berlin, Volgograd,  Saratov. I have never been to London. It’s my dream. Seaside is better to travel in summer because you can swim and dive, sunbathe and relax. My parents and I always take a camera with us when we are going to travel because we like to take photos very much. To my mind it is better to travel for pleasure because you may relax and don’t think about business.