12.____ we have finished the course,we shall start doing more revision work.

12.____ we have finished the course,we shall start doing more revision work.
.[A] For now[B] Now that [C] Ever since[D] By now
题 13
13.John regretted ____ to the meeting last week.[A] not going[B] not to go[C] not having been going[D] not to be going