—Why did you leave the water running in the sink?
—My goodness! I guess I ____ to turn off the tap．
| A．forgot | B．have forgotten | C．forget | D．had forgottten |
—Alas! I have left my key to the office in my car.
—Don't worry. I ________ it for you. Wait a minute.
| A．get | B．am going to get |
| C．will get | D．am getting |
—Did you enjoy meeting your old schoolmates at the party last week?
—Yes, I did. We ________ each other since we graduated from college.
| A．haven't seen | B．didn't see |
| C．hadn't seen | D．wouldn't see |
Siberian Tigers ________ and killed at such a speed that they will disappear from the earth in the near future.
| A．hunted | B．are hunted |
| C．are being hunted | D．had been hunted |
To her disappointment, what she had devoted herself to ________ in nothing but failure.
| A．resulting | B．results |
| C．has resulted | D．resulted |
Give me an undisturbed hour and I ________ the work Tom has left unfinished.
| A．see to | B．will see to |
| C．would be seeing to | D．have seen to |