A. even if you have tried it B. although you have tried it C. before you have tried it D. when it has been tried several times 参考答案:C 答案解析:细节题。答案在第三段第一句。只有经过尝试才知道自己是否喜欢。
第33题: [单项选择]The world’s water balance is regulated by the constant circulation of water in Liquid and vapor tom among the oceans, the atmospheric, and the land. 参考答案:D 答案解析:答案: D. atmospheric: atmosphere
分析: 前面the oceans, 后面the land 提示中间用名词。
参考译文:地球水平衡要求持续不断的循环, 从液态到气态