—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!

题型：单选题题类：模拟题难易度：普通

—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