(x+9)/10+(x+10)/9=9/(x+10)+10/(x+9)

(x-1)/(x^2-x+1)-(x+1)/x^2+x+1=10/x*(x^4+x^2+1)

1. I visited London once before. second => This is……………………………………..

2. I spend much my free time on my hobby. up => My hobbies………………………………….

3. The mistakes by scientists caused a massive explosion. in => The mistakes………………….resulted

4. Another name for iron oxide is “fool’s gold”. as => Iron oxide…………………. is known as fool’s

5. Nobody has ever been this far into the jungle. the => This is ………………the farthest anyone has ever been to

6. I don’t want to be a vegan anymore. tired => I………………………………

7. This town has a lot more cinemas than it had in the past. used=> This town………………never used to

Have a walk (1)___ a beach, listen to the sound of the sea waves, and suddenly you see a lot of  rubbish on the beach. Pollution takes away all the (2)__ of our beaches. I feel really very annoyed (3)__ I see plastic bags lying on the sand, cigarette ends buried in the sand, and soda cans floating in the sea. There are a lot of things that we can do. (4)___ we see rubbish, we should do our part in the protecting the land (5)__ picking it up and throwing it in dust bins. (6)_____, we can form some kind of organization that helps (7)____ the beaches. If everyone does their part, the beaches will be a wonderful and beautiful place. We need to start now (8)___ the beaches are damaged beyond repair.

1. A. at B. in C. on D. over                             2. A. beauty B. beautiful C. beautifully D. being beautiful

3. A. before B. after C. when D. while          4. A. While B. If C. Unless D. Soon

5. A. by B. with C. of D. in                            6. A. Nevertheless B. Therefore C.  However D. Moreover

7. A. cleaning up B. clean up C. cleaning of D.  clean of       8. A. before B. after C.  until D. when