The little girl ______TV all day. She did nothing.  [ ]

A. keeps watching  

B.kept to watching  

C.keeps to watch  

D.kept watching

某企业第四季度发生下列支出：(1)支付本年度负担的保险费3600元；(2)支付本季度办公开支900元。则本季度费用为______元。

A．1200

B．900

C．3600

D．1800