题目内容
31、They use computers to keep the traffic ______
smoothly.
A. being run B. run C. to run D. running
试题答案
31、D
解析：考查非谓语动词Ving，这儿构成(keep sth. doing。)
They use computers to keep the traffic _____ smoothly.
A. being run B. run C. to run D. running
查看习题详情和答案>>They use computers to keep the traffic _______ smoothly.
A. being run B. run C. to run D. running
查看习题详情和答案>>They use computers to keep the traffic smoothly.
A. being run B. run C. to run D. running
查看习题详情和答案>>They use computers to keep the traffic ______ smoothly.
A. being run B. run C. to run D. running
查看习题详情和答案>>They use computers to keep the traffic _____ smoothly.
A. being run B. run C. to run D. running
查看习题详情和答案>>
They use computers to keep the traffic smoothly.
A. being run B. run C. to run D. running
查看习题详情和答案>>
They use computers to keep the traffic _______ smoothly.
A. being run B. run
C. to run D. running
[ ]
B. run
C. to run
D. running