单项选择题


A．Completing
B．To complete
C．Finishing
D．To finish
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单项选择题
A．thoughB．becauseC．soD．however
A．though
B．because
C．so
D．however
单项选择题
A．difficultB．sameC．interestingD．different
A．difficult
B．same
C．interesting
D．different
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