Complete the following passage which is closely related to Reading Passage 2. Try to use the words given below. NB: You may use any word more than once. In the experiment described in Part 2, a set of word【R1】______was used to investigate whether blind and sighted people perceive the symbolism in abstract【R2】______in the same way. Subjects were asked which word fitted best with a cycle and which with a square. From the【R3】______volunteers, everyone thought a cycle fitted " soft" while a square fitted " hard". However, only 51 % of the【R4】______volunteers assigned a cycle to【R5】______When the test was later repeated with【R6】______volunteers, it was found that they made【R7】______choices. associations; blind; deep; hard hundred; identical; pairs shapes; sighted; similar shallow; soft; words