Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.

Câu hỏi

Passengers are required to keep their seat belts securely ______ during takeoffs and landings.

Đáp án
C. fastened

Câu hỏi thuộc Bài tập:

E10- I-learn- Thi giữa kì II