I want to know either this sentences is correct or not?

No, It should read more like this:

 

Dear Sir,
   Thank you very much for the valuable time which you gave me today. It was a pleasure to meet with you. If I get an opportunity to work with your organisation, I will do my best to prove myself. 

 

However, I'm not a fan of the last sentence.

To understand is one thing, to teach is quite -----------------------------------------. a. other b. another c. the other d. the another 2. She looks -----------------------------------------than she is. a. more young b. more younger c. much younger d. very younger 3. We were caught -----------------------------------------a shower on our way home. a. in b. at c. with d. by Page 2 of 8 4. Study hard, -----------------------------------------you will fail the test. a. unless b. or c. If d. before 5. I would like to make -----------------------------------------with you. a. friend b. friends c. a friend d. the friend 6. Do it right away ----------------------------------------- you will be scolded. a. for b. but c. Or d. before 7. Our baseball team ----------------------------------------- nine players. a. has b. have 8. You must -----------------------------------------what I tell you to do. a. exactly do b. do exactly 9. That movie has a -----------------------------------------ending. a. surprised b. surprising 10. Archery is a game -----------------------------------------all over Bhutan. a. play b. playing c. played d. plays 11. He never fails -----------------------------------------his grandfather on Sunday. a. visiting b. visit c. to visit Page 3 of 8 12. I am looking forward ----------------------------------------- you. a. to see b. seeing c. to seeing 13. If you don’t go, I won’t go -----------------------------------------. a. too b. either 14. I have invited the neighbours ----------------------------------------- for a drink. a. away b. up c. off d. over 15. The divorce is tearing him -----------------------------------------. a. down b. apart c. out d. off

The continuing care retirement community CCRC has become one alternative to the impending increase in our elderly population according to stella espinoza professor of gerontology at the university of connecticut. Nursing homes are no longer the answer to this social need she said. They’re simply too costly for todays senior-citizens she added. CCRC's normally require a tremendous down payment to buy into a living unit then they require a considerable monthly "maintenance fee". This large initial investment together with the continuing high price of socalled maintenance means that many americans will be excluded from the CCRC of their choice. "It’s a shame that getting old has to be so expensive" said espinoza there are three things involved here affordability convenience and human dignity.

The continuing care retirement community CCRC has become one alternative to the impending increase in our elderly population according to stella espinoza professor of gerontology at the university of connecticut. Nursing homes are no longer the answer to this social need she said. They’re simply too costly for todays senior-citizens she added. CCRC's normally require a tremendous down payment to buy into a living unit then they require a considerable monthly "maintenance fee". This large initial investment together with the continuing high price of socalled maintenance means that many americans will be excluded from the CCRC of their choice. "It’s a shame that getting old has to be so expensive" said espinoza there are three things involved here affordability convenience and human dignit

i have never seen you.

Dear Sir,

Thank you very much for you valuable time which you gave me today. It is my pleasure to spend quality time with you. If I get an opportunity to work with your organisation, I will live up to your expectation.

 

With respects, I remain,

 

Sincerely yours,

Heck no! You "gave me" should replace the error. Don't use an ampersand, and please replace "sat with you" to "meet with you". Myself is actually one word. And "level best"? Really?