Not until I shouted at the top of my voice his head．
| A．did he turn | B．he turned | C．didn’t he turn | D．had he turned |
There is a real possibility that these animals could be frightened，__________a sudden loud noise.
| A．being there | B．should there be |
| C．there was | D．there having been |
If the horse won today，it__________thirty races in five years.
| A．would have won | B．won |
| C．must have won | D．did have won |
If I were you,I__________ his offer.
| A．would accept | B．accepted |
| C．will accept | D．can accept |
Look at the terrible situation I am in! If only I__________your advice.
| A．follow | B．would follow |
| C．had followed | D．have followed |
—Where is Jack?I can’t find him anywhere.
—He__________ his homework upstairs.
| A．might have done | B．must have done |
| C．must be doing | D．must do |