By the time Jack comes back from his hometown, we _______ all the preparations.

A.finish
B.have finished
C.had finished
D.shall 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