Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

Câu hỏi

Something happen unexpectedly, and people aren’t prepared for it.

A. happen

B. unexpectedly

C. and

D. it

Đáp án
A. happen

Câu hỏi thuộc Bài tập:

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