They have been _____ about what may have caused the fire.(theory)

They have been skating for five hours 同义句 They have been skating_______ _____ ________ ______ They have never been to New York,_____? They have been here for two days.(改为同义句)They _____ here two days _____. They are wet all over.They _____ the rainA must have been caught inB must have been caught by They have been in army for ten years.(改同义句) _____ _____ ten years _____ they joined the army. Where have they been? They have never been to Beijing,_____ _____.填空变成反义疑问句 They have been married for 15 years 同义句=They ____ _____ 15 years. They have been _____ about what may have caused the fire.(theory) They _____ China for two years.A.have been to B.have been in C.has gone to Few of the children in this area have been to Beijing,_____?A are they B have they They have a____ been there They have been practicing the guitar for two hours.(改为同义句)They have been practicing the guitar _____ two hours_____. They have been friends ___for ten years___.(对划线部分提问） _____ ____ ___ they ___ friends? my parents have been to beijing before(改为一般疑问句,并作肯定回答）_____ your parents _____ to Beijing before?____, they _____. 一个关于现在完成时选择题?A:These farmer have been to the United States. B:Really? When _____ there? A did they go B have they what have they been doing 是什么时态 What places have they been?怎么翻译?