The (A) economy of this country is based (B) to a great extent (C) in its forests

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Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

The (A) economy of this country is based (B) to a great extent (C) in its forests, which cover 80 (D) percent of its surface area.

economy

in its

percent of

Giải thích

Chọn đáp án B

Cấu trúc: - be + based + on: được dựa vào, căn cứ vào

E.g: This film is based on a real-life incident.

Do đó: to => on

Dịch: Nền kinh tế của nước này dựa vào diện tích rừng, chiếm 80% diện tích bề mặt.