Questions 26 to 29 are based on the passage you have just heard.

A．He doesn’t understand his staff.
B．His computer doesn’t work properly.
C．He doesn’t know how to apply computer theory.
D．He is unable to add the figures.

A．Separate houses were built for storing ice.
B．Double walls were built in icehouses to keep cool.
C．Blocks of ice were packed with weed in icehouses.
D．Ice was put into icehouses in winter.