100 câu trắc nghiệm Câu điều kiện có đáp án (Phần 1)

The computer __________ so often if __________ it.

5/10

The computer __________ so often if __________ it.

had not crashed / Larry tested

might not have crashed / had tested

might not have crashed / have tested

crashed not / had tested

Giải thích

Chọn đáp án B