题目

The yellow-black winter fog has disappeared since the Clean Air Act was _____ in 1956 in London．        A．carried away     B．carried out             C．taken up               D．taken off 答案：B小明对沿途农业的说法，不可信的是（　　） A、①城附近农民在晾制葡萄干 B、②城郊区农民在给棉花施肥 C、连绵的绿洲上，雨水充足，水稻茂盛 D、绿洲零星分布在山麓处