— English has large vocabulary, hasn't it?

— Yes. ______ more English and expressions and you will find it easier to read and communicate. [ ]

A. Know

B. Knowing

C. To know

D. Known

南京一报关行张三报关员辞职后未将报关员证交回海关注销，按照规定，该报关行应该在7个工作日将其报关证交回海关注销。