摘要：Once what to do,these computers will show great power in carrying it out. A.to teach B.teaches C.teaching D.taught
网址：http://m.1010jiajiao.com/timu3_id_2488074[举报]
Once ________ what to do, these computers will show great power in carrying it out.
[ ]
A. to teach
B. teaches
C. teaching
D. taught