If I were you, I would take it easy; _____ is no need to be nervous [ ]

下列词语中，没有错别字的一项是（ ）

She always goes swimming ________cold it is.

I’m trying to find a better way to _______ my old books.— OK.

The Great Wall is so good a place ________ many foreign people come to visit ________ it has become well known all over the world