I'm sure you'll get into all sorts of trouble unless there isn’t this clause in your contract . Правильно ли употреблено isn’t?

Господарські роботи 
Вроде так

How many books did you buy

Китайский язык самый сложный.В нем более 40 000 иероглифов!

Ann- Hello, recently my parents and I went to travel to another country. It was a great trip! Do you like travelling?
Daria- Yes, of course I like travelling! I think it`s wonderful to get to know a new  culture or meet new interesting people. 
Ann- Where have you been?
Daria-I was in Australia, in Thailand, in Vietnam and in Egypt.
Ann-Which country did you like most?
Daria-I liked Australia. There are a lot of exotic fruits and animals in Australia.
Ann-What type of travel do you prefer?
Daria- I prefer to go around all the places by car. This significantly (сложное слово, означает значительно) saves time! Soon my family amd I will go to Altai. 
Ann- It`s perfect. I wish you a good holiday!