( it's a pen .A.look B.look at C.listen D.read....

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ALook! 看!
C、D明显不对,钢笔只能被看见.
B look at 要加宾语,如look at the blackboard
======以下答案可供参考======
供参考答案1:
A look供参考答案2:
A供参考答案3:
A，看！它是一支钢笔。