red is a symbol of warmth, it can sometimes make people feel uneasy or even frightened.
A．AsB．WhileC．IfD．Since
B
詞義辨析。As正如，正像；While雖然，盡管；If是否，如果；Since自從，因?yàn)椋捎�。雖然紅色是溫暖的象征，有時(shí)它會(huì)讓人感覺(jué)不舒服甚至害怕。所以選B。
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