Một mặt cầu có diện tích 9pi a2 . Khi đó bán kính r của mặt cầu bằng

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 26 to 30.

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the best answer to each of the questions from 31 to 35.

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the best answer to each of the questions from 36 to 42.

It is possible that he will redecorate his house this year.

"I have found a part-time job," Bob said.

Mai last went abroad two years ago.

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