Trắc nghiệm Chuyên đề 5: Writing có đáp án (Phần 2)
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We read about an astronaut. The astronaut travelled into space in 1961.  We read about

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We read about an astronaut. The astronaut travelled into space in 1961.

è  We read about       ___________________________________________________________________

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We read about an astronaut who travelled into space in 1961.