Một mảnh đất hcn có chu vi bằng 28cm và độ dài đường chéo bằng 10cm. Tính chiều dài, chiều rộng của mảnh đất đó.

giải chi tiết giúp mình vs ạ, toán diện tích mình hơi ngu.

Mark letter A, B, C or D on your answer sheet to indicate the sentence that is closest in meaning to the original sentence in each of the following questions.

Câu 41. He started learning French six years ago.

       A. He hasn't learnt French for six years.

       B. It was six years ago did he start learning French.

       C. He has learned French for six years.

       D. It is six years since he has learnt French.

 Câu 42. You should clean this room every day.

       A. This room should clean every day.                     

       B. This room should been cleaned every day.

       C. This room should be clean every day.                

       D. This room should be cleaned every day.

 Câu 43. Study hard or you will fail the exam.

       A. You don't study hard, so you will fail the exam.                                       

       B. You don't fail the exam unless you study hard.

       C. If you don't study hard, you will fail the exam.

       D. Because you study hard, you don't fail the exam.

 Câu 44. "Let's go on a picnic today.", said Jane

       A. Jane suggested to go on a picnic.                       

       B. Jane allow us to go on a picnic.

       C. Jane wanted us to going on a picnic.                  

       D. Jane suggested going on a picnic.                      

 Câu 45. Although the weather is bad, we enjoy our trip.

       A. Despite the bad weather, we enjoy our trip.

       B. In spite of being bad weather, we enjoy our trip.

       C. Despite of the bad weather, we enjoy our trip.

       D. In spite of the weather is bad, we enjoy our trip.

Mark letter A, B, C or D on your answer sheet to indicate the sentence that is built from the given words in each of the following questions.

 Câu 46. Mr. Tuan / want / you / come / his office.

       A. Mr. Tuan wants that you come to his office.     

       B. Mr. Tuan wants you coming to his office.

       C. Mr. Tuan wants you come to his office.             

       D. Mr. Tuan wants you to come to his office.

 Câu 47. I write / cancel our meeting / tennis club / Wednesday 13th.

       A. I am writing canceling our meeting at the tennis club on Wednesday 13^th.

       B. I am writing to cancel our meeting at the tennis club in Wednesday 13^th.

       C. I am writing to cancel our meeting at the tennis club on Wednesday 13^th.

       D. I have written to cancel our meeting at the tennis club on Wednesday 13^th.

 Câu 48. Do/ you/ know/ man/ sat/ next/ me/ Nam's birthday party/ last night?

       A. Do you know the man who sat next to me at Nam's birthday party last night?

       B. Do you know the man that sat next me at Nam's birthday at last night?

       C. Do you know the man whose sat next to me at Nam's birthday party last night?

       D. Do you know the man whom sat next to me at Nam's birthday last night?

 Câu 49. It/ say/ that/ he / good student.

       A. It is say that he is a good student.                      

       B. It is say that he is good student.

       C. It is said that he is good student.                       

       D. It is said that he is a good student.

 Câu 50. She / be / best / student / class.

       A. She was the best student in the class.                

       B. She is best student in the class.

       C. She is the best student in the class.                    

giúp và giải thích vs ạ, mình cảm ơn