Part C
You will hear a radio program. As you listen, you must answer questions 21—30 by writing NO MORE THAN THREE words in the space provided on the right. You will hear the program TWICE.
Albert thinks that his work is unhealthy because of the ______ on the nerves.

A．Many burglars break into residential houses without using force because the doors are not locked.
B．Residents should fit in break-resident glass for the sake of safety.
C．Some burglars can break into a house even the glass is break-resident.
D．People should make very sure that each door is locked when they go out even for a very short period of time.

A．19.
B．15,
C．17.
D．20.