Tổng hợp đề luyện thi Đại Học môn Tiếng Anh có lời giải(Đề số 2)

We called an ambulance as soon as we realised that he seemed to be having ____ heart attack.

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

We called an ambulance as soon as we realised that he seemed to be having ____ heart attack.

a

an

the

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