问题
选择题
Today, computers are really helpful. They ____ everywhere.[ ]
A. use
B. are used
C. used
D. were used
答案
答案：B
搜题请搜索小程序“爱下问搜题”
Today, computers are really helpful. They ____ everywhere.[ ]
A. use
B. are used
C. used
D. were used
答案：B