There is nothing in the rules of grammar to suggest that ending a sentence with a preposition is wrong.语法规则中并没有规定句子以介词结尾是错误的。Some people think it is wrong to end a sentence with a preposition, but the construction is quite common in English.有些人认为以介词结尾的句子是错误的，但这种结构在英语中却非常普遍。You should cancel this preposition in the sentence.你应该删去句子中的这个介系词。