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Câu hỏi: Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
I can't find the theater tickets. They___________out of my pocket.
A. must have fallen
B. should have fallen
C. had to fall
D. must fallen
I can't find the theater tickets. They___________out of my pocket.
A. must have fallen
B. should have fallen
C. had to fall
D. must fallen
Must have + past participle: chắc hẳn đã
Đáp án A.