问题
选择题
30. The No. 5 subway line, ______in October, 2007, has greatly improved the traffic conditions in Beijing.
A．opened
B．was opened
C．being opened
D．to be opened
答案
答案：A
搜题请搜索小程序“爱下问搜题”
30. The No. 5 subway line, ______in October, 2007, has greatly improved the traffic conditions in Beijing.
A．opened
B．was opened
C．being opened
D．to be opened
答案：A