The road is covered with snow. I can’t understand they insist on going by motor-bike.A. w

问题补充：

The road is covered with snow. I can’t understand they insist on going by motor-bike.

A. why

B. whether

C. when

D. how

答案：

(答案→)A. why

B. whether

C. when

D. how

解析：主要测试宾语从句。充分把握题干挖掘所有可能存在的信息。意思：路上有积雪。我不理解他们为何坚持骑摩托车去。此题可以结合语境及答案两方面，逐一排查寻找最佳答案。充分注意所给答案能够充当句子什么成分这也是解题的关键。