Write the sentence using have (has) been/have (has) gone. don't forget about full stops. example 0. i haven't seen kate for ages. (she/paris/for a year) answer 0. she has gone to paris for a year. 1. she is still there. (she/berlin) 2. john will be back tomorrow. (he/india) 3. he isn't in the office now. (jack has gone to a restaurant for lunch)

1. If number of speakers decrease, some languages will be endangered.
2. If Internet reaches all corners of the world, English as the Net language will influence the culture of non-speaking countries.
3. If English keeps on being global, other languages won’t set foot on Internet. 4. The world’s linguistic experts will be alarmed if many languages disappear at an alarming rate.
5. If some tribes aren’t urbanized and assimilated into mainstream, their languages won’t die out.
6. Youngsters will be able to communicate with people from abroad, if they learn foreign languages.
7. If the EU wasn’t worried about endangered languages, they wouldn’t issue a special directive on preserving them.
8. If minority languages aren’t politically tolerated, they will be in jeopardy.
9. If the high number of languages spoken in the EU corridors, it would be like a Tower of Babel.
10. If English is the language of trade and diplomacy, it will be considered as lingua franca nowadays. 

We always hear many students complain about having to study math or chemistry, even when they don't want to become a doctor or an engeneer. And it's possible to understand, it is actually true, the majority of the students won't even use math in the future. however, it is still important to study compulsory subjects. First of all, there are thousands of jobs that require knowing mathematics, even the final exam mark will matter to a college or the university you'll apply to. Actually, everyone uses math whether they realize it or not. In our everyday life we count in stores to find out how much something costs, and in the future things like that will stay important as well. Math helps us with other subjects, like physics and chemistry. A lot of math problems help the students to solve tasks in physics.