单项选择题


A．to play
B．having played
C．playing
D．to have played
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单项选择题
A．universeB．sphereC．realmD．space
A．universe
B．sphere
C．realm
D．space
单项选择题
A．carryingB．launchingC．sendingD．landing
A．carrying
B．launching
C．sending
D．landing
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