It was said that the Chinese used
their cats as clocks in the days before the invention
of the watch. The pupils of the cat’s eyes were
believed to gradually change ____________ with
the position of the sun in the sky. At midday
they were a narrow line and they gradually became
rounder until sunset. [1점] //1997Q22
① habit ② feelings
③ time ④ schools
⑤ shape