Cho hàm số y   =   x 2 . Hãy tính y ' x o bằng định nghĩa.

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.

He really deserved the award because he performed _________ what was expected of him.

A. much better than

B. much better which

C. the most that

D. much more as

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions.

We spend about one-third of our lives sleeping. We know relatively little about sleep.

A. We shall know more about sleep if we spend more than one-third of our lives sleeping.

B. Despite spending about one-third of our lives sleeping, we know relatively little about sleep.

C. We spend about one-third of our lives sleeping so that we know relatively little about sleep.

D. We know relatively little about sleep; as a result, we spend about one-third of our lives sleeping.