题目

— Why didn’t you try your best to get on the underground? — I tried to, but it started moving ______ I could get on it.A. before B. while C. as soon as D. after 答案：【答案】A【解析】试题分析：句意：你为什么不尽最大努力乘坐地铁？我尽力啦，但在我上车前它就开了。Before在……之前；while当……时候，as...as...一……就……；after在……后。根据句意可知选A。Do you know anything about airport security(安全)? In order to protect passengers, airports have 小题1:________rules. Some of these rules include:Restricted items小题2:________ are not allowed on board. In the past, knives under four inches were allowed on board, 小题3:________ now, knives are not permitted at all.ID checksAll passengers must have ID cards 小题4:________ match their boarding passes. Passengers are unable to fly小题5:_________these documents.Security on the aircraftGenerally, 小题6:________ are not permitted to enter the cockpit, where the pilot sits, 小题7:________when the plane is in the air. In order to increase security, bullet-proof doors and locks are now standard on all planes.Forbidden liquidsNo liquids over 100ml may be 小题8:________ on board in hand luggage. Liquids 小题9:______ 100ml must be carried in a clear plastic bag. This 小题10:________water, shampoo, toner etc