•We can offer you refunds if the goods you returned are not dirty and unusable.•You can get refunds if the goods you returned remain clean and usable.请问这两句话中 if 后的时态是否正确?
第一题:___ have I seen a better performance.A. Nowhere else B. Nowhere 用哪个合适呢?第二个句子:Nowhere else in the world can a tourist find cheaper tailoring than in Hongkong. 用Nowhere可以嘛?他们俩之间的区别到底是什么呢?