They use computers to keep th…——2009 高考英语第 32 题答案解析

2009_全国Ⅱ卷卷 (英语)

2009 全国Ⅱ Paper Question 32 Single-choice Differentiating

2009_全国Ⅱ卷卷 (英语)

16. They use computers to keep the traffic smoothly.

A. being run

B. run

C. to run

D. running

Answer key

D

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