问答题 请选择你听到的词组。（    ） 请选择你听到的句子译文。（    ）

单项选择题 1. The couple began to adopt a frugal lifestyle because they made less money now and couldn’t afford many things they had had before. A、正确 B、错误

单项选择题 众人过桥之时，都是以混乱的脚步通过，这是因为一旦桥梁的振动周期和过桥之际人的振动周期相同时，会发生倒塌危险。（ ）A.对B.错