<篇章結構>第31至34題為題組 Have you ever thought of “coloring” the names of the days of the week? When you listen to someone speaking， do you see a rainbow of colors? Or perhaps Mozart’s music tastes like an apple pie to you? If so， it is very likely that you have synesthesia.
Synesthesia is a condition in which people’s senses intermix. In some cases， people with synesthesia may experience colors when they hear， read， or even think of letters and numbers. In others， words can trigger a real sensation of taste on their tongue.
__31__ In the early 1990s， however， scientists noticed that synesthetic colors do not change over time. When asked what color is evoked by a letter or number， synesthetic people would persistently give the same answer even if tested months or years apart. (A) This consistency serves as a proof that synesthesia is real. (B) Meanwhile， environmental influences seem to shape a person’s synesthesia. (C) People with synesthesia used to be accused of making their experiences up. (D) Some studies even show that people may all be synesthetic to some degree.
