1.He was a good swimmer,so he__swim to the bank when the boat turned over.A.was able toB.could答案A。表示过去特定情况下的能力,只能用 was [were] able to,不能用 could。turn over的意思是“翻船”。2.-Tom,you are caught late again.-Oh,___________.a.not at allb.just my luckc.never mindd.that's all right选B,not at all的意思是“没关系”,just my luck的意思是“只是我运气不好”,never mind的意思是“没关系”,that's all right的意思是“没关系”。3.A fence__our garden___the playing field.A.divides;intoB.separates;intoC.separates;fromD.divides;from答案C。separate 和 divide的区分:两者均可表示“分开”:divide 通常指把整体分为若干部分,其后常接介词 into;而 separate 通常指把原来连在一起或靠近的东西分隔开来,其后常接介词 from。如:The world is divided into seven continents. 世界被分成七大洲。We’d better separate the good ones from the bad ones. 我们最好把好的和坏的分开。4.____your mother,I found her healthy and she had me tell you to work hard.A.Delighted to seeB.Delighter to have seenC.Delighting to have seen选B。但答案中的 Delighter 应为 Delighted。因为是“感到高兴”,故不能和 delighting,排除C;又因为“已经看到了”,所以要用完成式,故选 B,不选 A。