问题
选择题
Going on a trip into ______ space must be quite ______ exciting experience.
A．/ ; the
B．the; a
C．the; an
D．/ ; an
答案
答案：D
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Going on a trip into ______ space must be quite ______ exciting experience.
A．/ ; the
B．the; a
C．the; an
D．/ ; an
答案：D