After Yang Liwei succeeded in circling the earth,_____ our astronauts desire to do is walk in space.
问题描述：
After Yang Liwei succeeded in circling the earth,_____ our astronauts desire to do is walk in space.
A.where B.what
C.that D.how
答
_____ our astronauts desire to do is walk in space.
这部分是主语从句,do后面缺成分,用what