A、 Remembering word definitions.
B、 Recognizing repeated numbers.
C、 Distinguishing between similar colors.
D、 Tasting sounds.

【正确答案】 D

【答案解析】解析：细节题。根据For example，a person with synesthesia may taste sounds．可知有联觉的人能够品尝声音的味道。因此，正确答案是D。

A、 To explain the causes of synesthesia.
B、 To prove that sound and color can affect a person' s mood.
C、 To determine whether or not synesthesia exists.
D、 To show how creativity can be stimulated.

【正确答案】 C

【答案解析】解析：细节题。根据For a long time，many scientists were unconvinced that synesthesia really exists．So in the1990s an experiment was done to find out for sure．可知长时间以来，科学家并不相信联觉的存在，所以科学家们做了一个实验来验证。因此，正确答案是C。

A、 Consistently associate words with certain colors.
B、 Memorize long lists of words.
C、 Use colored printing to learn pronunciation.
D、 Use words creatively in art objects.

【正确答案】 A

【答案解析】解析：细节题。根据After just a week，the controlled group gave the same answers only a third of the time．Buteven a year of a half later，the synesthetic group gave the same answers 92％ of the time．可知一些人可以长时间的将声音和颜色联系起来。因此，正确答案是A。