1996年，泰丰公司继通过ISO9001质量体系认证后又获得了更为专业化、更为严格的（）国（）品质保证体系认证。

A.英BABT

B.美FCC

C.美UL

D.加拿大CSA

Last year the number of students who graduated with a driving licence reached 200,000, a(n) ______ of 40,000 per year.

A．average

B．number

C．amount

D．quantity