题目内容

You have to wear a helmet and a life jacket for protection, just ___ you fall into the water.

A. in case B. unless

C. though D. as

A

【解析】

试题分析:句意是:你不得不戴头盔穿安全服,以防万一你落在水里面。in case 以防万一; unless 除非; though 尽管;as由于,故选A

考点:考查状语从句。

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3.A. DadB. teachersC. friendsD. brothers

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The plans for building the Underground met with several problems and delays, but the fast track was finally opened in January 1863. A steam train pulled the cars along the fast underground track which was 6 kilometers (3.7 miles) long. About 30,000 people got on the subway the first day. Riders were treated to comfortable seats (standing up while the train was moving was not allowed),and pleasant decorations inside each of the cars. However,the smoke from the engine soon filled the air in the tunnels with ash and soot(煤灰),as well as chemical gases. Fans had to be put in the tunnels later to keep the air clean enough for people to breathe. Even with its problems,riding in the Underground did catch on. It carried 9 million riders in its first year.

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