* Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 31 to 35.
A. goes
B. flies
C. passes
D. walks
* Đáp án
* Hướng dẫn giải
chọn ACụm cố định as time go by: thời gian cứ trôi qua