Trắc nghiệm Chuyên đề 3: Multiple choice (vocabulary and grammar) có đáp án

Yuri Gagarin was in orbit in a spaceship moved around the Earth at the speed of more than 17,000 miles per hour.

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Yuri Gagarin was in orbit in a spaceship                   moved around the Earth at the speed of more than 17,000 miles per hour.

which

at which

it

this

Giải thích

Chọn đáp án A