What is the boy doing?He is (look)at the public signs.

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Whatistheboydoing?Heis(look)atthepublicsigns.Whatistheboydoing?Heis(look)atthepublicsigns.Whatistheb

What is the boy doing?He is (look)at the public signs.
What is the boy doing?He is (look)at the public signs.

What is the boy doing?He is (look)at the public signs.
填:looking
注:现在进行时的结构 be doing sth