Loulan city is not at all a traveler who has never seen the desert before can imagine.A. t

问题补充：

Loulan city is not at all a traveler who has never seen the desert before can imagine.

A. that

B. what

C. which

D. where

答案：

A. that

(答案→)B. what

C. which

D. where

解析：考查名词性从句。在本句中what引导表语从句，what a traveler who has never seen the desert before can imagine并作为动词imagine的宾语。That引导名词性从句，在句中不充当任何成分，只起连接作用；which指特定范围之内的哪一个；where在名词性从句中做状语。What引导名词性从句做主语，宾语和表语。