I don’t know who invented _____digital camera, and it’s really _____ most useful invention.
| A．the; a | B．the; the | C．a; a | D．不填；不填 |
It is _____third time that John has failed, but he still hopes to have_____ fourth try.
| A．the; the | B．a; the | C．the; a | D．a; a |
My father bought me an _____ guitar as my birthday present .
| A．electrical | B．electric |
| C．electronic | D．electricity |
John opened the door . There _____ he had never seen before.
| A．A girl did stand | B．a girl stood |
| C．did a girl stand | D．stood a girl |
The old couple have been married for 40 years and never once ____with each other.
| A．they had quarreled | B．they’ve quarreled |
| C．have they quarreled | D．had they quarreled |
The policeman stopped him when he was driving home and ____ him of speeding .
| A．charged | B．accused | C．blamed | D．criticized |