see each other before never 连成一段话

you have never met each other before,( 为什么选Never before have we seen each other 而不是选B,它的结构是什么? see each other的中文 I n___to see each other. do not see each other. we did not know each other before we have k___ each other before People never greet each other on the happy they are-----------(see)each other. we are happy _______(see) each other! They are happy to see each other we used to see each other