问题
选择题
Last year the number of students who graduated with a driving license reached 200,000, a(n) _______ of 40,000 per year.
A．average
B．number
C．amount
D．quantity
答案
答案：A
短语辨析。An average of 平均；句意：去年取得驾照的毕业生的数量达到了20万，平均每年4万。