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题型：单选题题类：常考题难易度：普通

He was often seen _________ with charity work last year.

A、to help B、helped C、helping D、help

举一反三

——Lisa was seen ______ an old man go across the street this morning.
——What a kind girl she is!

Students can't be made ______ all day.

I was made {#blank#}1{#/blank#} (read) the text once more by Miss Chen.

The girl was heard __________ in the next room every afternoon.

Your brother was made his homework by your father.

It's believed that bamboo is a harmless material. It doesn't cause any pollution when it has to be {#blank#}1{#/blank#}(throw) away.

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