Trắc nghiệm Chuyên đề 5: Writing có đáp án (Phần 1)
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It/ certain/ laughter/ positive way/ release tensions/ and/ gain/ close relationships.

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      It/ certain/ laughter/ positive way/ release tensions/ and/ gain/ close relationships.

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Giải thích

It is certain that laughter in a positive way to release tensions, and gain a close relationships.