单项选择题


A．selections
B．series
C．chains
D．strings
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单项选择题
A．fascinatingB．interestingC．disappointingD．touching
A．fascinating
B．interesting
C．disappointing
D．touching
单项选择题
A．moreoverB．thereforeC．whereasD．however
A．moreover
B．therefore
C．whereas
D．however
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