Kids are not allowed to leave kindergartens their parents e to pick them up.
A. unless
B. since
C. although
D. because
网友回答
(答案→)A. unless
B. since
C. although
D. because
解析：A. unless 除非…否则B. since自从，因为 C. although 尽管D. because因为；句意：孩子们不允许离开幼儿园，除非他们的父母亲来接他们。故选A.