If the sea water continues to be polluted, many fish species ______ extinct.
A. become
B. will become
C. would become
D. have become
Mệnh đề If có động từ chia ở thì hiện tại đơn, =>đây là câu điều kiện loại I (diễn đạt một điều có thể xảy ra trong tương lai hoặc hiện tại) =>sử dụng cấu trúc câu điều kiện loại I: If+S+V (V chia ở thì hiện tại), S+will+V_infi
=>If the sea water continues to be polluted, many fish species will become extinct.
Tạm dịch: Nếu nước biển tiếp tục bị ô nhiễm, nhiều loài cá sẽ bị tuyệt chủng.
Đáp án cần chọn là: B
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