It is time the whole society began to take action to ______ (使我们的环境免于毁灭)

A．the existence of the symphony was attributed to the spread of Near Eastern and Chinese music
B．Near Eastern music had an influence on the development of the instruments in the symphony orchestra
C．the development of the symphony shows the mutual influence of Eastern and Western music
D．the musical instruments in the symphony orchestra were developed on the basis of Near Eastern music

A．performance is a better judge of ability than a college degree
B．experience is the best teacher
C．past work histories influence personnel officers more than degrees do.
D．a degree from a famous school enables an applicant to gain advantage over others in job competition