第8题: [单项选择]—It is a long time ______ I saw you last. —Yes, and what a pity it is since it will be a long time ______ we see each other again.
A. before; since B. since; before C. when; when D. since; when 参考答案:B 答案解析:[解析]本题考查的是since和before的用法区别。第一句是过去时态,表示的是过去的事情,用since。第二句是将来时态,表示的是将来的事情,用before。故本题答案为B。