Read the following sign or notice and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.
What does the sign say?

Câu hỏi
Read the following sign or notice and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.
What does the sign say?

Câu hỏi thuộc Bài tập: