If Columbus _______ money from Queen Isabella, he _______ across the Atlantic.
A. do not receive/ could not sail
B. had not received/ might not have sailed
C. did not receive/ might not have sailed
D. would not receive/ might not sail
KEY: B
Giải thích: câu điều kiện loại 3
Dịch: Nếu Columbus không nhận tiền từ nữ hoàng Isabella, có thể ông ấy đã không băng qua đại tây dương.
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