单项选择题

Sorry I can't answer your question. I know ______ about the subject.

A．a little
B．some
C．little
D．few
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单项选择题
______ from space, our earth, with water covering 70% of its surface, appears as a blue planet .
A．Seen
B．Seeing
C．To be seen
D．Having seen
单项选择题
The building ______ mostly undamaged after the earthquake, and only minor repairs were necessary.
A．discovered
B．lasted
C．consisted
D．remained
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