问题补充：
As is known to all,the water in the seamuch salt.
A. holds
B. contains
C. includes
D. covers
答案：
A. holds
(答案→)B. contains
C. includes
D. covers
解析：动词辨析。A握住；保留；容纳；C包含；容纳；C包括；D覆盖，采访；句意：众所周知，海里的水中含有很多盐分。Contain包括…的成分。根据句意说明B正确。
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