EET模式的养老金计划中的T是指（）。

A.个人退休后每月领取的养老金需纳税

B.个人工作期间内缴费需纳税

C.个人工作期间内缴费的投资收益需纳税

D.个人退休后每月领取的养老金免税

（）from the top of the tower, the south foot of the mountain is a sea of trees.

A. Seen

B. Seeing

C. Having seen

D. To see