Your desk is crowded with too many unnecessary things, including used papers and books. You’s better ______ some of them.
| A.remain | B.recover | C.remove | D.replace | 
It seems that water from this tap ________ for some time.We'll have to take it apart to put it right.
| A.had leaked | B.is leaking | 
| C.leaked | D.has been leaking | 
—I hear Jane has gone to the Holy Island for her holiday.
 —Oh,how nice!Do you know when she ________?
| A.was leaving | B.had left | 
| C.has left | D.left | 
The discussion ________ alive when an interesting topic was brought in.
| A.was coming | B.had come | 
| C.has come | D.came | 
My mind wasn't on what he was saying,so I'm afraid I ________ half of it.
| A.was missing | B.had missed | 
| C.will miss | D.missed | 
All the preparations for the task ________,and we're ready to start.
| A.completed | B.complete | 
| C.had been completed | D.have been completed |