---How could you _______ my sister so easily in the crowd ?

   ---Because she stood out in a red dress.

  A. pick out         B. pick up          C. take up           D. take out 

Not until the motorbike looked almost new ______repairing and cleaning it.

   A. he stopped        B. did he stop       C. stopped he        D. he did stop

_________ the task , they have to stay there for another two weeks.

   A. Not completing    B. Not completed    C. Not having completed  D. Having not completed

Visitors were struck by the natural _________ here, which was beautiful beyond description.

 A. resource            B. scenery        C. disaster           D. element

If you don’t explain clearly, you will just _______ the reader.

   A. confuse        B. satisfy       C. intend          D. remind

Gun control is a subject ________Americans have argued for a long time,

   A. of which       B. with which     C. into which      D. about which 

Before the tourists set off , they spent much time setting a limit _____ the expenses of the trip.

A. in             B. for            C. to               D. about

The public transportation is very convenient in that big city , so there______be any difficulty in

traveling around .

A．mustn’t     B．wouldn’t         C．shouldn’t        D. needn’t

_____ is known to us is that the 2012 Olympic Games will take place in London．

A．It             B．Which        C.As               D. What.

---I’m afraid I can’t go to Jane’s party this Sunday night.

   ---Oh, _________. You promised.

   A. no problem      B. come on       C. no hurry          D. that’s Ok.