The two companies have reached a partial agreement but several differences still between

问题补充：

The two companies have reached a partial agreement, but several differences still between them.

A. happen

B. survive

C. appear

D. exist

答案：

A. happen

B. survive

C. appear

(答案→)D. exist

解析：本题考查动词辨析。句意：……但他们之间仍然存在一些差异。exist 存在。happen发生；survive幸免于难；appear出现