He is determined to become a specialist ________ computer when he grows up.
| A．for | B．in | C．on | D．about |
It is difficult for any of us to eat better, exercise more and sleep enough _________ we know we should.
| A．despite | B．even though | C．as if | D．unless |
Hardly _______________ when we were told to stop.
| A．did we begin | B．had we begun |
| C．were we beginning | D．were we to begin |
The girl seldom, if _____, turned to her brother for protection.
| A．never | B．ever | C．always | D．then |
She is such a lovely girl ____ is liked by everybody.
| A．what | B．as | C．that | D．which |
---Why don’t you use the knife?
---It needs ___________________.
| A．sharpen | B．being sharpened | C．sharpening | D．to sharpen |