氧气是一种化学性质比较活泼的气体，它可以和许多物质发生反应
—Mrs. Black, I'm afraid that I'll fail the exam.
—________, dear! Take it easy. I'm sure you'll pass it.
文艺复兴代表人物的美术作品，许多以《圣经》故事为题材。他们的这些杰作与神学宗教画的最大区别在于
— Many people think Wei Fang ______ her mother.
— Me, too.
