Had they known what was coming next, they ___________ second thoughts.
| A．may have | B．could have | C．must have had | D．might have had |
So fast ________ that I could not catch up with them.
| A．did they run | B．they had run | C．they ran | D．had they run |
Only ______ the painting _______ decide whether it is worth buying.
| A．that he sees; can he | B．that does he see; he can |
| C．when he sees; can he | D．when does he see; can he |
"On no account ____to feed the animals", the warning can be seen on the signboard in front of every cage.
| A．allow visitors | B．visitors are allowed |
| C．are visitors allowed | D．are allowed visitors |
-Did Linda see the traffic accident? -No, no sooner ______than it happened.
| A．had she gone | B．she had gone | C．has she gone | D．she has gone |
_____ English that I couldn’t follow her.
| A．So did fast the native speak | B．So fast did the native speak |
| C．Did the native speak so fast | D．So fast the native did speak |
24. Not until I completed the form______ that half questions were not relevant to me.
| A．hadIrealized | B．Ihadrealized | C．Irealized | D．didIrealize |
Only after my friend came .
| A．did the computer repair | B．he repaired the computer |
| C．was the computer repaired | D．the computer was repaired |
_______ after the race that he didn’t know what to say before so many reporters.
| A．So excited the champion was | B．So excited was the champion |
| C．So the champion was excited | D．So was excited the champion |
It was announced that only when the fire was under control_______to return to their homes.
| A．the residents would be permitted | B．had the residents been permitted |
| C．would the residents be permitted | D．the residents had been permitted |