Question 48: Tourists are required to wear the life jacket when swimming at the beach.

A. Tourists can wear the life jacket when swimming at the beach.

B. Tourists would wear the life jacket when swimming at the beach.

C. Tourists must wear the life jacket when swimming at the beach.

D. Tourists should wear the life jacket when swimming at the beach.

Giải thích: Modal verb (động từ khuyết thiếu: tobe required – được yêu cầu)

Tạm dịch: Du khách được yêu cầu mang áo phao khi bơi tại bãi biển.