Only when I made it to the train station _______ that I had left my ticket at home.
| A．have I realized | B．did I realize | C．had I realized | D．would I realize |
Nobody noticed he entered the room because the lights _________________ burst.
| A．happened to | B．were to |
| C．in order to | D．should have |
Please call the station to make sure when the earliest train ______________.
| A．has left | B．left |
| C．leaves | D．is leaving |
--- Don’t forget to turn to me if you have any trouble. ---- __________________.
| A．I don’t | B．I won’t |
| C．I can’t | D．I haven’t |
It is _________ you speak ill of others behind them __________ she hates you.
| A．because; why | B．because; that |
| C．for; that | D．for; which |
Your speech was heard by a group of five _________, all of __________ agreed that it was the best one this year.
| A．judge; whom | B．judges; them |
| C．judge; them | D．judges; whom |