Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions from 31 to 35:
A. put a tick
B. reduced considerably
C. motivated to develop
D. examined carefully
* Đáp án
B
* Hướng dẫn giải
Đáp án B
Check (v): ngăn cản, cản trở = reduce considerably