They have been in the library since_______.A:a long time agoB:it had been openC:eight o'clockD:two hours应该选哪个?为什么?

they have been in kate's for Where have they been?能不能说：They have been in their room. The 11th National Games have been s_____ held in Shandong in October,2009. Where have they been? they have been in china for 5 years快 In fact,you did not know they could have been they have -------(been,arrived)in shanghai for 2 days. they have been tather timid in the changes they have made,求翻译 Trayn and Jeff Have ever been friends.But when they go up to the 6th grade,everything changes.翻 2道高中英语语法题1.___ his warning,we would not have escaped the burning dacing hall.A.Hadn't been for B.Had it not been for C.It hadn't been for D.Had not it been for2.It was in the lab ___ was taken charge of by Prof.Harris ____ they did th They have a school trip in March 16th. 有哪里错 they have a big dinner in the evening on august 15th(改为同义句) Thay have a football game in September哪里错了They have a football game in September 15th They have a____ been there have been in I have been in. 现在完成时have/has gone to,have/has been to,have been in有什么区别The pupils zhe Palace Museum today.They are back now 答案是什么用have/has gone to,have/has been to,have been in填空 They _____ China for two years.A.have been to B.have been in C.has gone to