Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.

Câu hỏi

Their building is thought _______ after the heavy storm last night.

A. to be collapsed

B. to have collapsed

C. to have been collapsed

D. to collapse

Đáp án
B. to have collapsed

Câu hỏi thuộc Bài tập:

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