I waved to Nancy, but she was ___ in her thoughts, and made no response.
| A．involved |
| B．stuck |
| C．absorbed |
| D．interested |
He spent too much time talking on ______ phone while we were all busy at _____ work.
| A．the, 不填 | B．a, 不填 | C．不填, 不填 | D．the, the |
As is known to us all, _____ tiger is in _____ danger of becoming extinct.
| A．the, a | B．the, 不填 | C．a, 不填 | D．不填, the |
This is _____ best kind of _____ pen you can get here.
| A．the, the | B．the, a | C．the, 不填 | D．a, the |
How strange! These years my birthday always falls _____.
| A．on the Sunday | B．on a Sunday | C．on Sunday | D．at a Sunday |
They promise that the work would all be finished _____ next week.
| A．until | B．in | C．by | D．to |