2000 câu trắc nghiệm tổng hợp Tiếng Anh 2025 có đáp án (Phần 40)

My teeth were a little yellow so I ________ by the dentist.

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My teeth were a little yellow so I ________ by the dentist.

had cleaned them

have them cleaned

was cleaned them

had them cleaned

Giải thích

Đáp án: D