观察下列句子中的画线部分并指出它们的句法功能。

1．Their job is “panning for gold”．

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2．That was the problem facing Charlie Chaplin．

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3．He sat down at the table with his plate and drinking cup．

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4．Do you find it funny to see someone sliding on a banana skin, bumping into someone else round a corner, or falling down a hole in the road?

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