Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.
He _________ alone a month ago, and _________ of since.
A. set off/hasn’t been heard
B. setted off/hasn’t heard
C. set on/hasn’t heard
D. setted on/hadn’t been heard
Đáp án A
Loại B và D vì set-set-set. Set off: khởi hành
Set on/upon SB: tấn công ai đó đột ngột