---Mysonisaddictedtocomputergames.Heishopeless,isn’the...
来源：语文精选馆 1.95W
问题详情：
--- My son is addicted to computer games. He is hopeless, isn’t he?
--- Yes, _______ he is determined to give up and start all over.
A. if B. when C. once D. unless
【回答】
D
知识点：连词
题型：选择题
