We expected there no problem with the publication of the book by now but it is still bein

问题补充：

We expected there no problem with the publication of the book by now, but it is still being printed.

A. being

B. to be

C. to have been

D. having been

答案：

(答案→)A. being

B. to be

C. to have been

D. having been

解析：考条件状语从句中的时态。一般用现在时。