. After hearing the terrifying story, Polly hid behind the door, _______ with fear.
| A．to shake | B．shaking |
| C．shook | D．having shaken |
If the dog hadn’t woken us, we wouldn’t have noticed the fire and it _______ to the house next door．
| A．could spread | B．should have spread |
| C．would spread | D．might have spread |
When the man came in, gun in hand, we all stood there, ________．
| A．astonished | B．astonishing |
| C．being astonished | D．having astonished |
If nature does not provide man with the necessary material, it is the laboratory ____ he will turn to for it．
| A．where | B．that | C．which | D．what |
By the time you have completed the essential training, you _____ exposed to virtually every new feature of the course．
| A．are | B．will have been | C．have been | D．will be |
_______ more to be pitied than blamed．
| A．Uneducated are | B．Uneducated is |
| C．The uneducated are | D．The uneducated is |