题目列表(包括答案和解析)
It is years I last visited the mine . I wonder how things are getting on there .
A . before B . when C . until D . since
It is years I last visited the mine . I wonder how things are getting on there .
A . before B . when C . until D . since
It is years I last visited the mine . I wonder how things are getting on there .
| A．before | B．when | C．until | D．since |
It is years I last visited the mine . I wonder how things are getting on there .
A . before B . when C . until D . since
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