单项选择题


A．But
B．Thus
C．Though
D．However
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单项选择题
A．economicalB．economicC．financialD．physical
A．economical
B．economic
C．financial
D．physical
单项选择题
A．howeverB．thereforeC．whateverD．though
A．however
B．therefore
C．whatever
D．though
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