15. “ (       ) ” can be an example to illustrate the feature floor by way of staircase.

   A. Would you mind going upstairs right away, please?

   B. Time you all go upstairs, now.

   C. Visitors should go up the stairs at once.

   D. Visitors should make their way at once to the upper floor by way of staircase.

16.In business English “ in the black ” means(       )

   A. running a business with no money

   B. running a business with bad fortune

   C. running a business profitably

   D. running a business at a loss

17. “ She drives me out of my mind ” illustrates the metaphor about (       ).

   A. love is madness                                       B. love is war

   C. love is magic                                                  D. love is a patient

18.In English individualistic culture, one should not bother Englishmen without a good reason and making appointment beforehand seems to be important. It is best reflected by an English proverb (       ).

   A.an Englishman's house is his castle

   B. as welcome as a storm

   C. do not wear out your welcome

   D. outstay one's welcome

19. “ To know something like the palm of one's hand ” means(       ).

   A. to understand the nature of something and be competent in the performance of them

   B. to understand everything without any question

   C. to understand only something easy