问题
选择题
I ______ a soccer ball. I like it very much.[ ]
A. have
B. has
C. do
D. does
答案
答案：A
搜题请搜索小程序“爱下问搜题”
I ______ a soccer ball. I like it very much.[ ]
A. have
B. has
C. do
D. does
答案：A
，已知X1与X2不相关，则