___ in the fascinating book , he did not notice a thief enter his room.
| A．To absorb | B．Absorbing | C．Absorbed | D．To be absorbed |
In some languages, 100 words make up half of all words _______in daily conversations.
| A．using | B．to use | C．having used | D．used |
_______ which university to attend, the girl asked her teacher for advice.
| A．Not knowing | B．Knowing not | C．Not known | D．Known not |
The airport _______ next year will help promote tourism in this area.
| A．being completed | B．to be completed |
| C．completed | D．having been completed |
The room is empty except for a bookshelf _____ in one corner.
| A．standing | B．to stand | C．stands | D．stood |
I stopped the car ____ a short break as I was feeling tired.
| A．take | B．taking | C．to take | D．taken |