Chứng minh rằng:  n + 6 n + 3 ⋮ 2  với  ∀ n ∈ Ν

Research has shown that students, especially those in high schools and  universities, can learn ________ they do from instructions and textbooks.

A. so many that 

B. as much as

C. as many as 

D. so much that

Mark the letter A, B, C or D to indicate the underlined part that needs correction in each of the following questions.

(A) The populace was (B) so terrified of the tornado that (C) however town she visited she found (D) villages deserted of inhabitants and livestock.

A.The populace was

B.so terrified 

C.however

D.villages deserted

Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) OPPOSITE in meaning to the underlined word(s) in each of the following questions.

As a newspaper reporter, she always wanted to get information at first hand. 

A. indirectly

B. directly

C. easily

D. slowly

Chứng tỏ rằng:

a, Tổng của ba số tự nhiên liên tiếp là một số chia hết cho 3.

b, Tổng của bốn số tự nhiên liên tiếp là một số không chia hết cho 4.

c,  a b - b a ⋮ 9 với a>b

d, Nếu  a b + c d ⋮ 11 thì  a b c d ⋮ 11

Mark the letter A, it C, or D on your answer sheet to indicate the word(s) CLOSEST in meaning to the underlined word (s) in each of the following questions.

A US man with a large online following in Vietnam has caused widespread anger, and faces possible criminal charges, over a Facebook post thought to have insulted a military hero.

A. embarrassed

B. offended 

C. confused 

D. depressed