2009-06-23 所属栏目:完型填空

　　If you cannot see, you may not be able to find your way out of a burning building-and that could be fatal. A company in Leeds could change all that__1__ directional sound alarms capable of guidin

2009-06-23 所属栏目:完型填空

　　Before 1933, and particularly during the period 1929-33, bank failures were not uncommon. _1_ a bank overextended itself in creating credit or if several of its important loans could not be _2_,