合格药品库是属于

A．应明确质量条款
B．资格和质量保证能力的审核
C．应进行质量审核，审核合格后方可经营
D．应进行质量评审
E．应以质量为前提，从合法的企业进货

You should tell your mother _____________now.

A．what you are doing

B．what are you doing

C．what you were doing

D．what were you doing