Don’t leave Tom alone－he is in such a large house.
| A．frightening | B．to frighten |
| C．frightened | D．Frighten |
Shortly after suffering from a massive earthquake and________to ruins，the city took on a new look.
| A．reducing | B．reduced |
| C．being reduced | D．having reduced |
Laura was away in Paris for over a week.When she got home，there was a pile of mail________for her.
| A．waited | B．to wait | C．waiting | D．was waiting |
Let those in need ________ that we will go all out to help them.
| A．to understand | B．understand |
| C．understanding | D．understood |
The witnesses ________ by the police just now gave very different descriptions of the fight.
| A．questioned | B．being questioned |
| C．to be questioned | D．having questioned |
________which university to attend，the girl asked her teacher for advice.
| A．Not knowing | B．Knowing not |
| C．Not known | D．Known not |