Shall Mary come and play computer games?--No, she has finished her homework.A. whenB.

发布时间：2020-08-17 15:13:17

--Shall Mary e and play puter games?
--No,      she has finished her homework.
A. when
B. if
C. unless
D. once

网友回答

A. when
B. if
(答案→)C. unless
D. once
解析：本题只要理解了句意就能很容易地选出unless。句意为：“玛丽要来打电脑游戏吗?”“不，除非她完成了作业。”
以上问题属网友观点，不代表本站立场，仅供参考！