By () billy we have learned that you would like to establish business relations with usA、the courtesy fromB、courtesies fromC、the courtesies ofD、the courtesy of
By () billy we have learned that you would like to establish business relations with us
A、the courtesy from
B、courtesies from
C、the courtesies of
D、the courtesy of
相关考题：
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You look（） What（）you（）?Atire；did；doBtiring；have；doneCtired；do；doDtired；have；been doing