---What do you think made Mary so upset?
--- ______ her new bike.
| A．As she lost |
| B．Lost |
| C．Losing |
| D．Because of losing |
31．-----She missed her train to London,____she didn"t seem to care．
---- Well, there is anotherl one in 15 minutes．
| A．or | B．as | C．thus | D．Yet |
30．Mr．Snuth advised us to________a written agreement even it was just a small deal．
| A．hold on | B．insist on | C．believe in | D．rely on |
29．There are also instructions about the________of all the buttons and switches．
| A．purpose | B．function | C．power | D．Effect |
28．The university with two____campuses hasa student population of 50,000 in total．
| A．unique | B．single | C．separate | D．Alternative |
27．Let' s move all the products into the hall and_____them in a proper order．
| A．design | B．decorate | C．develop | D．Arrange |