Many experts believe that teachers’ development is _____ the key to better education lies. 
| A．that | B．what | C．where | D．which |
You have been working so hard------I think you _____ a holiday
| A．desert | B．deserve | C．devote | D．define |
After arriving in New York the Chinese college students find it rather hard to______ living at his own.
| A．rely on | B．adjust to | C．approve of | D．bring up |
We only moved a new flat last week .Once we've _______, we must go to visit you in person.
| A．settled in | B．settled up | C．settled up | D．settled ourselves |
Having retired from business, she now ______ herself with the rights of women and welfare of the disabled.
| A．associated | B．occupied | C．charged | D．rewards |
This is ___ book ___ I wrote.
| A．the only ….which | B．a very…that | C．the only…that | D．the just…which |