问题补充：
---What are you going to do next weekend?
---I yet. Do you have any good ideas?
A. haven decided
B. won decide
C. have decided
D. didn decide
答案：
(答案→)A. haven decided
B. won decide
C. have decided
D. didn decide
解析：句意：你打算下个周末做什么？我还没有作出决定。你有什么好想法吗？根据yet一词可知该用现在完成时态的否定形式，所以选A。
