Singing and dancing, the children were __________ the park when it began to rain cats and dogs.
| A．turning to |
| B．aiming at |
| C．heading for |
| D．putting off |
Mary ________ as a secretary in this company for twenty years and now she stays at home taking care of her own garden.
| A．has served | B．had served |
| C．is serving | D．served |
They ________ to go shopping in the downtown district, but they cancelled it because of a hard rain.
| A．had intended | B．intended |
| C．have intended | D．were intending |
—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 |