which have been translated into affected products.有什么语法错误

which countries have you been? 英语翻译ABC importers have been found exclusively in prokaryotic organisms,whereas ex-porters are produced ubiquitously by all the domains of life还有tran-scriptomic Which foretgn country or countries have you been to? My other half in which,Have been born yet appear! which have been translated into affected products.有什么语法错误 which must have been taken before level 2 course -I am not now that which i have been. it's one of the most important meetings____this yearA that has been heldB which has been heldC that have been heldD which have held we have been producing too many of the gases which后面的which是什么意思.为 I'll study IT-just which I have been dream about为什么把which改为what? 是it is the place where i have been to 还是it is the place which i have been to Which other countried have you been a volunteer in?=______ ______ have you been a volunteer in?改为countries there are courses which must have been taken before levl 2这句话怎么翻译 尤其是have been taken 359.1 students may have to do jobs which have not yet been invented.如何翻译? 英语A and B which are very important have been studied.A and B which are very important have been studied.A and B are very important which have been studied.这两句那个对,还是都对,为什么 have been have been have been