【单选题】An international team of astronomers has discovered 11 new planets outside the solar system, raising fresh ______ about the possibility of life in outer space.
A．exploring
B．debate
C．wondering
D．pondering
【单选题】An international team of astronomers has discovered 11 new planets outside the solar system, raising fresh ______ about the possibility of life in outer space.
A．exploring
B．debate
C．wondering
D．pondering
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