Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.
Beaches were ………………….. as police searched for canisters of toxic waste from the damaged ship.
A. sealed off
B. cut off
C. washed up
D. kept out
Đáp án A
seal sb/st off: ngăn chặn ai/cái gì đi vào hoặc đi ra đâu đó