Bộ 10 đề ôn thi học sinh giỏi Tiếng anh lớp 9 có đáp án (Đề 4)

It’s difficult to see the moon in the sky ………………….. day.

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It’s difficult to see the moon in the sky ………………….. day.

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Giải thích

It’s difficult to see the moon in the sky by day.