(届湖北省荆州市高中毕业班质量检查(Ⅱ)英语试卷) Some people say that Mars should be protected as a wildlife reserve where we do everything possible to avoid pollution, on the _______ that life could exist on it.
(届陕西省商南高级中学高三第一学期三模英语试卷) Some students are now busy preparing for the “Independent Recruitment(自主招生)” contest, in hopes of getting a “Pass” card at their first _______.