500 câu trắc nghiệm giới từ trong Tiếng Anh có đáp án cực hay - Phần 10
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If there was a technical failure, Gagarin might never get __________ to the Earth.

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If there was a technical failure, Gagarin might never get __________ to the Earth.

to

back

from

down

Giải thích

Chọn B

get back = to return to a place after you have been somewhere else