Question

【题目】 (2014·江苏)Lessons can be learned to face the future, ________ history cannot be changed.

A. though B. as C. since D. unless

Answer 1

【答案】A

【解析】句意：虽然历史不可改变，但是吸取教训来面向未来。根据句意判断可知前后句之间为转折关系，故用连词though连接。