题目内容
When astronauts return to the earth’s atmosphere, helicopters fly to________they would land, ready to collect them.
| A.what | B.where | C.which | D.that |
B
解析
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题目内容
When astronauts return to the earth’s atmosphere, helicopters fly to________they would land, ready to collect them.
| A.what | B.where | C.which | D.that |
B
解析