—English has a large vocabulary, hasn’t it?

—Yes. ________ more words and expressions and you’ll find it easier to read and communicate.

A．Know

B．Knowing

C．To know

D．Known

特种设备监督检验的对象包括()。

A.设计过程 

B.制造过程 

C.安装过程 

D.改造过程 

E.重大维修过程