—Which of these two English books will you borrow?

—I’ll borrow ____________ of them because they are very interesting.

A．either

B．all

C．neither

D．both.

生产乳制品的原料及半成品在仓库堆放时，货品与墙壁间的距离为（）

A.10m以上

B.20m以上

C.30m以上

D.50m以上