Tom__________ Disneyland.  He is still there.[ ]

A. has been to      

B. has gone to

C. went to          

D. goes to

提高胃癌治愈率的关键在于（）.

A.术前、术中、术后化疗

B.根治性手术

C.早期诊断

D.放射治疗

E.综合治疗