there are still many advantages to keeping a pet.这个句子里为啥是to doing?

there are still 还是 there still are There are a lot of new buildings now, but many of the old buildings are still there的翻译 there are still many advantages to keeping a pet.这个句子里为啥是to doing? There are still many things for me to do,but I only have one bullet! There are still many diseases not (being) understood.括号里的要不要 为什么 There are still many problems of environmental protection in recent years 翻译成英语 There are still many problems of environmental protection in recent years. there are still many problems to deal with.句中的不定式作什么成份 are u still there,my There are many animals______farm there are still many people___ living condition are miserable A.who B.that C.which D.whose there are still （）people on the street（选择填空）A.little B.few C.much D.many There are still many family making a great effort to survice on low income翻译成汉语 there are many people still leading ___life under ___poverty line in the world .横线处填什么 The children there are being put in danger every day because many care workers still do not know ho You must have experienced many things in this field but you are still there,being on your feet.求翻译 Although lectures supply us with many advantages ,there are still some defects which can't be neglect We still don't know how many galaxies there are in the universe.什么句型结构?怎么分析