Bộ 20 đề ôn thi vào Chuyên Anh năm 2023 có đáp án (Đề 2)

when a cell phone is used near a person (5) a pacemaker to fegulate his heartbeat, its radio waves 

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when a cell phone is used near a person (5)________ a pacemaker to fegulate his heartbeat, its radio waves may interfere with the functioning of the pacemaker.

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