．(2013·江西九江高三二模)________ around the university, we then were taken to a building, where many scientists worked.
| A．Showing | B．Having been shown |
| C．Being shown | D．Having shown |
At no time________the rules of the game.It was unfair to punish them.
| A．they actually broke | B．do they actually break |
| C．did they actually break | D．they had actually broken |
Only when he apologizes for his rudeness ________ to him again.
| A．I will speak | B．will I speak |
| C．do I speak | D．I speak |
“Never for a second，”the boy says，“________that my father would come to my rescue.”
| A．I doubted | B．do I doubt |
| C．I have doubted | D．did I doubt |
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 |
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 |