Sie sind or Sie ist? Sie sind / ist Studentin? sind or ist, which one is right?

Es gibt Es gibt im Zimmer ein Bett? or Gibt es im Zimmer ein Bett? Which one is correct?

Missing until recently fossils clearly..... How was the gap between a walking mammal and a swimming whale bridged? Missing until recently fossils clearly intermediate, or transitional, between land mammals and cetaceans. Anyone can analyze this sentence for me? Thanks a lot for that. :)

About the translation.. Mendeleyev went further than Meyer in another respect; he predicted the properties of six elements yet to be discovered. I am curious how to translate this sentence, the book translates as the properties of six elements that he predicted had been discoovered. Is this right?

About word deeply... 'Other factors which must be considered in acupunture therapy include where needles are put into meridians, how deeply the needles are inserted, and even what the needles are made of.' this is a sentence I just met in one text. Is there anyone who can help me with this word "deeply" ? I think it shoul use "deep" not "deeply"... Thanks for your reading this question and answers. :)

Need help with this sentence. Considering human capital as a characteristic of the population, however, all four countries were advantaged by the large percentages of their populations who can read and write.

Need help about this sentence.. Fladmark and others believe that the first human colonization of America occurred by boat along the Northwest Coast during the very late Ice age, possibly as early as 14,000 years age. I am confused with this sentence...The first colonization of America occurred**by boat/along the Northwest Coast/ during the very late Ice age, possibly as early as 14,000 years age*** Is there anyone that can explain the structure of this sentence?

anyone can explain this sentence? A surplus allows snow to accumulate and for the pressure of snow accumulated over the years to transform buried snow into glacial ice with a depth great enough for the ice to flow.