Questions 7 and 8 are based on the following news. At the end of the news item, you will be given 20 seconds to answer the questions. Now listen to the news. So far 821 protected sites scatter across ______ countries.

A．work hard while their boss is around
B．come to work when there is work to be done
C．work with initiative and willingness
D．work through their lunch break

A．they are unaware of the consequences of what they are doing
B．they are reluctant to sacrifice their own economic interests
C．time has not yet come for them to put due emphasis on it
D．it is difficult for them to take effective measures