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题型：单选题题类：易错题难易度：普通

In April, 2009, President Hu inspected the warships in Qingdao, ______ the 60th anniversary of the founding of the PLA Navy.

A、marking B、marked C、having marked D、being marked

举一反三

We should do what we can ______ people's hard work pays off.

The houses ________ are for the teachers and the construction work will start soon.

There are still many problems ________ before we are ready for a long stay on the moon.

____________and evaluated the information, I help other scientists to predict where lava from the volcano will flow next and how fast.

_________ and clearly intelligent, Tony is a pleasant person to talk with.

I think you'd better have yourself {#blank#}1{#/blank#}(examine) when you are free.

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