Because two speakers cannot attend today, the organizers have decided to ______ the lecture until Friday.
- prevent
- prepare
- produce
- postpone
【答案】D
【解析】postpone表示“推迟”，常用结构为postpone sth. until + 时间。prevent是“阻止”，prepare是“准备”，produce是“生产”，都不符合“改到周五”的语义。
The report gives a ______ description of the test, including the time, place, materials, and each step.
- silent
- narrow
- general
- detailed
【答案】D
【解析】后文列出了时间、地点、材料和每一步，说明描述“详细”。general意为“概括的”，与列出全部细节相反；silent和narrow均不能修饰此处的description以形成合理语义。