语法与词汇 4.The idea was just beginning to______in America and we knew that it was going to become the way that retailing companies were run.

A、 show up
B、 catch on
C、 open out
D、 get by

【正确答案】 B

【答案解析】本题空格处是说这个观念刚刚开始在美国变得风行起来。B项“catch on受欢迎，变得风行起来”符合题意，如：Skateboarding caught on quickly．(滑板运动很快就流行起来。)其他三项“show up来到，露面；open out展开，打开；get by过去，通过，维持生活”都不正确。