题目
Each worker puts in nearly 2,200 hours a year, ______ average, and contributes about 30 to GDP per hour.A. withB. inC. onD. under
Each worker puts in nearly 2,200 hours a year, ______ average, and contributes about $ 30 to GDP per hour.
A. with
B. in
C. on
D. under
题目解答
答案
C. on
解析
此题考查介词短语的使用。"on average" 是一个固定短语，意为“平均而言”，符合题意。其他选项与题意不符。