单项选择题

Erosion that is a slow process, but it constantly changes the features on the surface of the earth（）.

A．which is
B．although
C．being
D．is

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单项选择题
The pictures of the Loch Ness Monster show a remarkable resemblance to a plesiosaur, a large water reptile of the Mesozoic era presuming extinct for more than 70 million years（）.

A．supposed
B．presumably
C．presumptuous
D．is presumed
单项选择题
The trapeze artist who ran away with the clown broke up the lion tamer's heart（）.

A．broke away
B．broke down
C．broke
D．broken down
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