关于瑞氏染色的叙述，错误的是（）

A.血涂片干透后方可染色

B.染色时间与温度有关

C.染色过淡可复染

D.复染时不可先加染液

E.染色过深只有重新涂片再染

—Have you heard that Jones, along with her parents, ________to Hainan for the winter vacation?

—Really? No wonder I haven't seen her these days.[ ]

A. had been  

B. have been

C. has gone  

D. have gone