Jim and Kate _____ English.[ ]

A. are good in

B. are good at

C. is good at

D. are good with

早期胃癌是指癌浸润深度局限于：（）

A.粘膜层

B.粘膜下层

C.粘膜层及粘膜下层

D.肌层

E.浆膜层