He asked me ()during the summer holidays.A where I had beenB where I had goneC where had

继续教育 已帮助 人

He asked me ()during the summer holidays.

A、where I had been

B、where I had gone

C、where had I been

D、where had I gone

热搜:在常规制片中(HE染色)细胞核的染色原理为