6．—Let’s go shopping after school.

—        Call for me at that time.

A．That depends  B．Hold on, please

C．What for?  D．Sounds great

7．They suggested that the professor        just now should be made chairman of the meeting.

A．referring to B．referring 

C．referred to D．referred

8．Public      of the problem will make the government take it seriously.

A．awareness B．solution 

C．existence D．evidence