After Yang Li Wei succeeded in circling the earth our astronauts desire to do is walk in

问题补充：

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

答案：

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。