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

Drinking water excessive amounts of fluorides may leave a stained or mottled

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Drinking water _______ excessive amounts of fluorides may leave a stained or mottled effect on the enamel of teeth.

containing

in which containing

contains

that contain

Giải thích

Chọn A