is reported in the newspaper is that seventeen climbers have been killed in the snow storm

问题补充：

is reported in the newspaper is that seventeen climbers have been killed in the snow storm

A. That

B. As

C. It

D. What

答案：

A. That

B. As

C. It

(答案→)D. What

解析：考查主语从句。主语从句中缺少主语故用what，句意：在报纸上所报道的事情是十七名登山者在暴风雪中遇难。故选D。