Nowhere else in the world___more attractive scenery thanin Switzerland.

选C
这是部分倒装
部分倒装是指将谓语的一部分如助动词或情态倒装至主语之前.如果句中的谓语没有助动词或情态动词,则需添加助动词do,does或did,并将其置于主语之前.
1 句首为否定或半否定的词语,如no,not,never,seldom,little,hardly,at no time,in no way,not until… 等.
Never have I seen such a performance.
Nowhere will you find the answer to this question.
Not until the child fell asleep did the mother leave the room.
2 以否定词开头作部分倒装
如 Not only…but also,Hardly/Scarcely…when,No sooner… than
Not only did he refuse the gift,he also severely criticized the sender.
Hardly had she gone out when a student came to visit her.
No sooner had she gone out than a student came to visit her.