题目内容
The machine is so old it can't be used any more some of its parts are
changed.
A. as; unless B. that; unless C. that; if D. whether; or
B

|
题目内容
The machine is so old it can't be used any more some of its parts are
changed.
A. as; unless B. that; unless C. that; if D. whether; or
B
|