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 from 1 to 2.

His academic record at high school was poor. He failed to apply to that prestigious university.

A. His academic record at high school was poor as a result of his failure to apply to that prestigious university.

B. Failing to apply to that prestigious university, his academic record at high school was poor.

C. His academic record at high school was poor because he didn’t apply to that prestigious university.

D. His academic record at high school was poor, as a result, he failed to apply to that prestigious university

Cho tam giác ABC cân tại A, kẻ đường cao CD. Đường trung trực của BC cắt CD tại M.

a) Chứng minh  B M   ⊥   A C .

b) Tính B M D ^  biết A B C ^ =   70 ° .

Cho hai điểm A, B nằm trên đường trung trực của đoạn thẳng MN. Chứng minh ∆ M A B   = ∆ N A B

Bạn An thường ngủ 9 giờ mỗi ngày. Hỏi thời gian bạn ngủ chiếm mấy phần của ngày?