ⅰ.语法填空，单句训练 1．white has always been a ________ of purity in western cultures. 答案：symbol__考查名词。句意：在西方文化中白色总是纯洁的象征。symbol“象征”；sign“标记”，符合句意。 2．(2015·潍坊模拟改编)the mobile phone was ________(guarantee) for at least five years, but it was wrong only one year later.
