I’m sure Luisa was very disappointed when she failed the exam. A. Luisa must be very disappointed when she failed the exam. B. Luisa must have been very disappointed when she failed the exa

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I’m sure Luisa was very disappointed when she failed the exam.

Luisa must be very disappointed when she failed the exam.

Luisa must have been very disappointed when she failed the exam.

Luisa may be very disappointed when she failed the exam.

Luisa could have been very disappointed when she failed the exam.

Giải thích

Đáp án B

Tôi chắc rằng Luisa đã rất thất vọng khi cô ấy thi trượt.

Tình huống dự đoán trong quá khứ nên dùng must have Ved/ V3