【正文】
一、單項選擇 1 . My mother has taught in this school ________ she was twenty years old . (中考 德陽 ) A . for B . until C . because D . Since 2 . He was ________ the meeting because of his bad illness . A . absent from B . absent in C . absent D . absent at D A 【 點撥 】 分析句子結構法 。分析句子結構可知:主句是現(xiàn)在完成進行時,故從句用 since引導。 3 . We don’t have enough nurses to look after the patients . A