If you have something important ______, you’d better say it aloud rather than whispering to each other.

A. saying

B. to say

C. to saying

D. say

Quy đồng mẫu các phân số sau

a) 36 64 và  - 12 81

b)  14 13 và  4 - 23

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.

The speaker was asked to condense his presentation in order to allow his audiences have time to ask questions.

A. cut short

B. talk briefly

C. make longer

D. give details

Tìm số nguyên x thõa mãn:

a)  x − 3 49 = − 2 7

b)  x 4 = x + 1 8