Some 40 percent of the hired hands left before they()their term of service.

A.finish
B.finished
C.would finish
D.have finished
出自:河南师范大学-学前教育(专科)-大学英语I

完成拼图验证

按住下方滑块,将拼图拖到缺口处后松开。

拼图背景,将小拼图拖到缺口处
向右拖动滑块