After Yang Li Wei succeeded in circling the earth, our astronauts desire to do is walk in space.
A. where
B. what
C. that
D. How
网友回答
A. where
(答案→)B. what
C. that
D. How
解析：主要测试主语从句。解答该试题的关键在于弄明白句子结构。有语境可知该句子的结构同上面两道以下句子 our astronauts desire to do中缺少引导词和动词do的宾语即双重作用。答案显而易见。