Rút gọn biểu thức:

A = \(\left(\dfrac{\sqrt{x}+1}{\sqrt{xy}+1}+\dfrac{\sqrt{xy}+\sqrt{x}}{1-\sqrt{xy}}+1\right):\left(1-\dfrac{\sqrt{xy}+\sqrt{x}}{\sqrt{xy}-1}-\dfrac{\sqrt{x}+1}{\sqrt{xy}+1}\right)\)

Giúp mk làm bài này với ạ!!!

Choose the correct answer A, B, C or D to complete each sentence:

Supply the correct form of the verbs in brackets:

Mọi người ơi giúp mình làm bài này với ạ: 

Choose the correct answer A,B,C or D to complete the sentences:
1. Do you mind ...... in here? peaking is not allowed in the library.
A. no taliking            B. not talking           C. not talk          D. not to talk
2. My parents are never pleased with my grades ..... I get nothing less than a "B".
A. even though         B. despite               C. because        D. because of
3. We've decided to go on a vacation ....... all the financial problems we are going through.
A. although               B. since            C. in spite of        D. however
4. He has recieved several scholarships ......... his academic and artistic ability.
A. though                  B. because of           C. despite         D. for
5. I hope ...... in time for my trip to Australia next month.
A. recover           B. recovering      C. to recover      D. to be recovered 
6. I always put off ......... my homework until the last possible moment.
A. doing                     B. to do               C. do               D. in doing
7. ........ riding a bicycle is a good leg exercise, it does not use up a lot of calories.
A. As                   B. Because            C. If                 D. Although
8. I expect to get high marks in this exam ........ I put in a lot of work for it.
A. even though        B. whereas           C. so that           D. because
9. ......... working for the company for six months now, he never seems to know what to do.
A. Since                  B. Although              C. Despite          D. Because of
10. Are you going to make your daughter ........ part time in the store this summer?
A. work                   B. to work               C. working           D. worked
11. ....... he had read the instructions several times, he knew what to do.
A. Whereas             B. Until                  C. After                 D. Although
12. Patricia encouraged me .......... to Stanford, and I got in.
A. applying              B. to apply            C. apply                 D. applied
13. I feel like ........... to the movies this evening - want to come?
A. go                          B. to go               C. to going            D. going    
14. Our company is surviving ......... the fact that the economy has gone into recession.
A. although             B. because of        C. despite          D. whereas
15. It's no use ......... on the telephone. The line is always busy.
A. try to call        B. trying calling      C. to try calling     D. trying to call

Complete the second sentence so that it has a similar meaning to the first sentence:
1. Despite knowing she was wrong, Sarah refused to admit it.
-> Although ............
2. No film this year was as good as Alien Descent.
-> Alien Descent was by ..........
3. It wasn't unusual for George to turn up late.
-> George turned .......
4. People are buying thousands of gadgets on Black Friday all around the world.
-> Thousands .......
5. "It was Jim who broke my kitchen window!"
-> Mrs James accused Jim .........
6. Our plane arrived on time although there was a delay during takeoff.
-> In spite of ..........
7. I can't play professional football because I'm not tall enough.
-> I could ............
8. Hoa tried to get an intern position in that international company.
-> Hoa attempted .......
9. I feel nervous when I think about starting my new job.
-> It makes ............
10. Very few people succeed in losing weight and keeping it off.
-> Very few people managed ............

Complete the second sentence so that it has a similar meaning to the first sentence:
1. Although she has health problems, she is always so full of life. (DESPITE)
-> ................
2. "Don't cross the park at night", he told the children. (WARNED)
-> ................
3. i didn't forget to buy the bread. Here it is! (REMEMBERED)
-> ................
4. They intend reaching the mountains by the end of the week. (PLANNING)
-> ................
5. Have you decided where to go for your summer holidays? (MADE)
-> ................
6. Why don't we leave for the tour after breakfast on Saturday? (HOW)
-> ................
7. "I don't think I can go to the restaurant with you tonight" , Jane said. (REFUSED)
-> ................
8. We had the barbecue as planned in spite of the change in the weather. (ALTHOUGH)
-> ................
9. Would you like to go skating on Friday? (FANCY)
-> ................
10. It was such an interesting TV series that I watched it all in two days. (SO)
-> ................