问题补充：
-----Why you come and play basketball with us?
-----Because I have lots of homework to do.
A. not you
B. not
C. not to
D. don’t
答案：
A. not you
B. not
C. not to
(答案→)D. don’t
解析：句意：---为什么你不来和我们一起打篮球哪？---因为我有很多作业要做。考查固定用法：Why don’t you do sth?=Why not do sth? 故选D。
考点: 考查固定句式的用法。
