Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.
Larry drove all night to get here for his sister’s wedding. He _____ exhausted by the time he arrived.
A. ought to be
B. must have been
C. could be
D. will have been
Đáp án là B
Cấu trúc: must have+ PP: phỏng đoán điều có thể xảy ra trong quá khứ.