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

For ______ reasons, passengers are requested not to leave any luggage unattended.

A. secure

B. securely

C. security

D. securing

Đáp án
C. security

Câu hỏi thuộc Bài tập:

MODULE 13: WORD FORMATION (Exercise 5)