6000 câu trắc nghiệm tổng hợp Tiếng Anh 2024 có đáp án (Phần 20)

He didn’t go to the concert ________ he had already seen the band perform

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He didn’t go to the concert ________ he had already seen the band perform.

but

unless

because

if

Giải thích

Đáp án đúng là: C