1.no less than
不少于,多达
not less than至少
2.的确要选A,因为 return 跟 thank 并列,而不是跟came并列.来的目的是感谢你并且还你借给我的衣服.
3.你要把句子分解一下,第一节:The place ()the bridge is supposed to be built 第二节:The place should be()the cross-river traffic is the heaviest 它们都缺的是状语,因此都要用引导词where(=in which或at which)