When you replace a word, always make sure that the alternative you select does not change the meaning of the sentence.当你替换一个单词时，一定要确保你选择的替代选项不会改变句子的意思。
A.When you change a word with the alternative, you must, ensure that the meaning of the sentence varies. B.The meaning of the sentence can be different when you use the alternative you select to replace a word. C.Always keep the same meaning of the sentence when you use the alternative to replace a word.正确答案C
