Trắc nghiệm Chuyên đề 5: Writing có đáp án (Phần 2)
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I’m reading an article. The article is about NASA’s plans to return humans to the moon.  I’m reading

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I’m reading an article. The article is about NASA’s plans to return humans to the moon.

è  I’m reading       ___________________________________________________________________

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Giải thích

I’m reading an article which is about NASA’s plans to return humans to the moon.