On my way to school, I find a wallet           on the ground. I pick it up and hand it over to a policeman.[ ]

A. lie      

B. lied          

C. lying          

D. lay

网络交往的对象具有虚拟性、间接性和隐蔽性，带给人们的不利影响是为人们开阔眼界、结交新友提供了便利条件。[ ]