—How can I improve my spoken English?

—You have to practice _______ as much as you can.[ ]

A. speak        

B. speaking          

C. spoken        

D. to speak

大多数家电产品在关机状态下照样耗电，这种现象专业上叫“待机能耗”。请你选择具有待机功能的电器有哪些？（）

A.电脑

B.打印机

C.抽油烟机

D.电话

E.音响