- I haven’t seen my close friend John lately, and I wonder how things go with him.

- I _____ him the other day. He said he worked in a candy store.[ ]

A. have met with            

B. am going to meet with  

C. met with                

D. had met with

对应急广播系统扬声器清洁维护时，下列做法正确的是()。

（A）自行拆卸扬声器

（B）用水冲洗扬声器 

（C）用湿布擦拭扬声器

（D）用吹风机吹扫扬声器表面