Whilee-booksalesthisyearhavedeclined,itisstillimportan...

问题详情：

 While e-book sales this year have declined, it is still important for us to remember that the figures are still higher than ______ five years ago.

A. one    B. that

C. those    D. they

【回答】

C

知识点：代词

题型：选择题