15．(2017·南京高三模考)Never for one moment, believe it or not, ________ I imagined being faced with such a situation where a helping hand was greatly needed.

　　答案：had　解析：考查倒装和时态。根据前面的Never可知，此处应该用部分倒装结构；再根据后面的was可知，此处应用过去完成时，表示在过去的某一动作之前已完成的动作。因此填had。

　　.阅读理解(广告信息类)

　　A

　　What to do this weekend in London

　　Beach Camp

　　Walpole Park, Mattock Lane, Ealing, W5 (020 8579 5436), today and tomorrow (and until Thurs)，midday－6 pm, children ￡5, adults free.

　　Spend a day at the seaside without having to travel out of London. This children's event is part of Ealing's Summer Festival, and there's the added bonus that, if it rains, you don't have to pack up and go home either, as the “beach” will be in a weatherproof tent.

　　The Blue Peter Experience

　　BBC Experience, Broadcasting House, Portland Place, W1 (0870 603 0304), today and tomorrow,10 am－6 pm, adults ￡7.50, children ￡4.95.

　　The show may be over for the summer but now, with this new exhibition, young fans can find out about life behind the scenes on the long－running children's programme. There's the chance to have a go at presenting the show, watch clips of some of the funniest moments, as well as discovering endless fascinating facts about the programme.

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