What does this sign mean?

A. When you leave, please reduce the number of fans in your room.

B. Please leave the fans in the room after you go out.

C. Please reduce the costs of electricity by leaving the room.

D. Please switch off fans when you finish using a room to save electricity.

Đáp án
D. Please switch off fans when you finish using a room to save electricity.

Câu hỏi thuộc Bài tập:

FRIENDS PLUS 9 - ĐỀ ÔN TẬP ĐỊNH KỲ - UNIT 4 - TEST 2