On Feb 27, Chinese Premier Wen Jiabao took part in _____ online chat with Chinese netizens, who expressed interests and concerns over property prices, inflation, ________ wealth gap and other social issues

A.the ; a

B.an ; /

C.the; the

D.an ; the

答案及解析： D

解析：

考查冠词。句中an online chat with Chinese netizens一次与中国网民的在线交谈；

the wealth gap and other social issues特指收入差距和其它社会话题，故选D。