Question 25. Phong has some small cavities in his teeth ………..he doesn’t brush his teeth regularly.

Cơ bản
III. Em hãy chọn đáp án thích hợp nhất (A, B, C hay D) để điền vào chỗ trống cho mỗi câu sau.

Question 25. Phong has some small cavities in his teeth ………..he doesn’t brush his teeth regularly.
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