A．It helps little to save energy.
B．It brings about longer working days.
C．There exist some undesirable effects.
D．Radio and TV programmes become different.

A.It
B.
B．It
C.
C．There
D.
D．Radio
E.


【参考答案】

C
短文中提到，由于澳大利亚各州的夏令时不同，从而导致了一系列交通和其他社会问题，故为C)。