If you _____ her, we _____ out what was happening.[ ]

A. didn’t phone; would never found

B. hadn’t phoned; would never find

C. didn’t phone; would never have found

D. hadn’t phoned; would never have found

B淋巴细胞能特异性识别抗原的受体是

A．E受体

B．IgG Fc受体

C．C3受体

D．SIg受体

E．IgE Fc受体