In order to attract more customers, many supermarkets usually sell their goods at a good________ at weekends.
| A．benefit | B．discount | C．interest | D．cost |
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 |
26．The whole class_____searching for the missing boy when the heavy rain poured down
| A．was | B．were | C．had been | D．would be |