16.I _______ very happy if I could be of some service to you.\x05A.would be \x05\x05B.have been \x05C.must be \x05D.can be怎么选,为什么啊

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16.I _______ very happy if I could be of some service to you.\x05A.would be \x05\x05B.have been \x05C.must be \x05D.can be怎么选,为什么啊

16.I _______ very happy if I could be of some service to you.\x05A.would be \x05\x05B.have been \x05C.must be \x05D.can be怎么选,为什么啊
16.I _______ very happy if I could be of some service to you.
\x05A.would be \x05\x05B.have been \x05C.must be \x05D.can be
怎么选,为什么啊

16.I _______ very happy if I could be of some service to you.\x05A.would be \x05\x05B.have been \x05C.must be \x05D.can be怎么选,为什么啊
很高兴为您
A 虚拟语气

a or d
don't know

A