I really believe my letter came as a great surprise to John.

I really believe my letter came as a great surprise to John.

A. John might be very surprised to receive my letter.

B. John might have been very surprised to receive my letter.

C. John must be very surprised to receive my letter.

D. John must have been very surprised to receive my letter.
Xem đáp án
D là đáp án đúng
Lời giải:
Đáp án: D
Giải thích : cấu trúc must have PII: chắc hẳn đã làm gì