(2010·安徽合肥高三第一次教学质量检测) 27. 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
(2010·安徽合肥高三第一次教学质量检测) 27. 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