Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
Why are you so late? You _______ here two hours ago.
A. must have been
B. would have been
C. should have been
D. need have been
Đáp án C.
Cấu trúc should have + PP: lẽ ra nên làm điều gì nhưng đã không làm