In spite of the efforts of those industrious farmers, the local economy is far from developed due to isolation.

A．TV and radio can amuse us with beautiful songs and music
B．TV and radio have weakened our interest in entertaining ourselves
C．people should not be too lazy or embarrassed to sing
D．parents should sing songs and read books aloud to their children

A．have some mental problems
B．have lost our important things
C．don’t listen to what our friends tell us to do
D．fail to remember what should be remembered