—Tom,haveyoufinishedyourcomposition?   —Half      when...

问题详情：

 — Tom, have you finished your composition?   

— Half       when you come back．

A. has been done       B. is done             C. be done           D. will have been done

【回答】

D

知识点：虚拟语气与情态动词

题型：选择题