—Every day, my mother tries to spare some time to chat with me, she is very tired after a whole day’s hard work.
—You are lucky to have such a great mum!
A. unless
B. whether
C. although
D. until
网友回答
A. unless
B. whether
(答案→)C. although
D. until
解析：unless除非，如果不；whether是否；although 虽然，尽管；until直到。句意：每天我母亲都努力挤出时间来和我聊天，尽管她在一整天的工作之后非常累。——你有这样一位伟大的母亲，太幸运了。结合语境可知选C。