Chuyên đề 9: Hình thức phân từ
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After the World War II, the United Nations has been actively carrying out its convention to stop wars and bring peace to nations worldwide. A. Having studied B. Studying C. To study D. Being

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After the World War II, the United Nations has been actively carrying out its convention to stop wars and bring peace to nations worldwide.

Having studied

Studying

To study

Being studied

Giải thích

Chọn A