(2013·湖南，35)Not once________to Michael that he could one day become a top student in his class.
A．occurred it B．it did occur
C．it occurred D．did it occur
(2013·福建，34)Not until he went through real hardship ________ the love we have for our families is important.
A．had he realized B．did he realize
C．he realized D．he had realized
—Take this medicine three times a day，Tom!
—Do I have to take it？It ________ so terrible.
A．is tasting B．is tasted
C．tastes D．has tasted
It seems that water from this tap ________ for some time.We'll have to take it apart to put it right.
A．had leaked B．is leaking
C．leaked D．has been leaking
—I hear Jane has gone to the Holy Island for her holiday.
—Oh，how nice！Do you know when she ________？
A．was leaving B．had left
C．has left D．left
The discussion ________ alive when an interesting topic was brought in.
A．was coming B．had come
C．has come D．came
