I haven't been to the mountains

I haven't been to the mountains Have you___been to Beijing?No,I haven't been the my father hasn't been to Tibet.I haven't been to the Tibet,e I haven't been to Shanghai.( ). I haven't been back to the island是什么时态?为什吗要用been? my parents haven't been to shanghai,and i haven't been to sh ----I haven't been to the aquarium before . How about you, T 将句子改成复合句：I am not going to the party.I haven’t been invited. You have been to Beijing,haven‘t you?( )How I wish to go the I haven't been able to be outdoors for so long haven't been He hasn't been to Beijing.I haven't,either. I haven't been to ciname for a long time I haven't gone to c