有40件产品，编号1至40，现从中抽取4件检验，用系统抽样的方法确定所抽编号为  (  )

A．5, 10, 15, 20

B．2, 12, 22, 32

C．2, 14, 26, 38

D．5, 15, 26, 38

I’m sorry to tell you it is nearly five months ___ smith got injured in the leg, but I think it won’t be long ____ he completely recovers.

A．after; when

B．before; since

C．that; when

D．since; before