Many of the electric and electronic products we purchase and consume today are what some industrial experts call " homogeneous toys".（）

单项选择题The artist spent years on his monumental painting, which covered the whole roof of the church, the biggest in the country.（）

A．archaic
B．sentimental
C．outstanding
D．entire

单项选择题The feeling of competition among the students in all the classrooms where the test was going on was noticeable to everyone.（）

A．discord
B．discovery
C．rivalry
D．cooperation