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
问题描述：
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
答
A
答
a or d
don't know
答
很高兴为您
A 虚拟语气