A．Many of them found it difficult to exercise on a plane．
B．Many of them were concerned with their well-being．
C．Not many of them chose to do what she did．
D．Not many of them understood the program．
A．Books and periodicals．
B．Newspapers．
C．Audio and video materials．
D．24 personal computers．
A．Computer classes．
B．Training sessions．
C．Laser printing．
D．Package borrowing．
A．computer lab services
B．college library facilities
C．the use of micro-computers
D．printouts from the laser printer