Trường THPT chuyên Huỳnh Mẫn Đạt tỉnh Kiên Giang năm 2023 (lần 1)

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best completes each of the following exchanges.

Nam is talking to Lan about the environmental problem today. - Nam: "What are the main threats to the environment today?" - Lan: “_________________”