Although the increase in the present sum used for the research is________， a great breakthrough could still be achieved by the end of this year.
| A．common | B．sudden |
| C．enormous | D．modest |
The doctor ___ the boy and examined his back.
| A．turned down | B．turned on | C．turned to | D．turned over |
He found the boy ___ on the wall.
| A．hanged | B．hang | C．hung | D．to hanging |
If you ___ nature, you will not succeed in the end.
A. go with B. go against C.against D, be against
Do you __ your son to be a doctor?
| A．hope | B．think | C．expect | D．look forward to |
All passengers ___ to show their tickets next time.
| A．require | B．will require | C．are required | D．are to require |