He was able to finish his book. It was because his wife helped him.

He was able to finish his book. It was because his wife helped him.
A. If only he had been able to finish his book.
B. If it weren’t for his wife’s help, he couldn’t have finished his book.
C. Without his wife’s help, he couldn’t have finished his book.
D. But for his wife’s help, he couldn’t finish his book.

Đáp án C

Anh ấy có thể tìm được quyển sách vì vợ anh ấy giúp anh ấy.
=> Câu điều kiện loại 3: Nếu không có sự giúp đỡ của vợ, anh ấy không thể tìm được quyển sách.