Joe, my close friend, moved to Beijing years ago, and I             him since then. [ ]

A. don't see

B. didn't see

C. haven't seen

D. won't see

多属弥漫型（）。

A.肺鳞状细胞癌

B.小细胞癌

C.肺腺癌

D.肺泡细胞癌

E.恶性间皮瘤