问题
单项选择题
0ur jumbo boom（）out of use for a long time.
A.is
B.will be
C.have been
D.has been
答案
参考答案：D
搜题请搜索小程序“爱下问搜题”
0ur jumbo boom（）out of use for a long time.
A.is
B.will be
C.have been
D.has been
参考答案：D
