jacky
问题补充说明：____ in the United States, St Louis has now become the 4th largest city. A．It is the 24th biggest cityB．It was the 24th biggest cityC．Before the 24th biggest cityD．Once the 24th biggest city
【答案】D
【答案解析】试题分析：句意：那是StLouis是美国排名第24的大城市，而如今它已成为排名第4的大城市。句子中间用逗号隔开，说明整个就是一个句子，那就不能存在两个谓语，除非其中一个是从句，所以去掉A、B两个答案，再根据句意，故选D。
考点：考查句子结构问题。
