Mark the letter A, B, C or D on your answer sheet to indicate the word or phrase that is OPPOSITE in meaning to the underlined part in each of the following questions
Population growth rates vary among regions and even among countries within the same region.
A. restrain
B. fluctuate
C. remain unstable
D. stayed unchanged
Đáp án là D.
“vary”: thay đổi, biến đổi
Trái nghĩa là stayed unchanged: giữ nguyên, không đổi gì