Although he looks____（严肃）,he is friendly to us.

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Althoughhelooks____（严肃）,heisfriendlytous.Althoughhelooks____（严肃）,heisfriendlytous.Althoughhelooks___

Although he looks____（严肃）,he is friendly to us.
Although he looks____（严肃）,he is friendly to us.

Although he looks____（严肃）,he is friendly to us.
serious