They are intelligent animals and can see work together as they hunt schools of small fish.

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问题 They are intelligent animals and can see work together as they hunt schools of small fish.

选项 A、can be seen working
B、to be seen working
C、can be seeing work
D、to be seeing work

答案A

解析 they和see之间是被动关系,be seen doing sth. 为固定搭配,意为“被看见正在做某事”,A项正确。
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