We are looking forward （D to our winter holiday）.
我们正盼望着寒假到来.
look forward to (doing) sth,期盼（做）某事.在介词to之后要接名词或动名词doing作宾语.
错误选项分析：
A to see you：to see错误,应该是seeing.
B seeing you：在seeing前缺少了介词to,不完整.
C to meet my friend：to meet错误,应该是meeting.