Misc: What are swedish buns?

Questions

---------- have been trained to have recognition vocabularies of 100 to 200 words. They can distinguish among different grammatical patterns.?

The ---------- eats nothing but eucalyptus leaves.?

The bluefin ---------- swims with its mouth partly open, relying on ramjet ventilation, unlike slower fish, which force water through their gills to remove oxygen and release carbon dioxide. Since seawater contains only about 2.5 percent as much oxygen it needs from the volume of water flowing through its mouth, the bluefin has proportionately one of the largest gill areas of any fish.?

Only tom turkeys ----------. Hen turkeys make a clicking noise.?

In 1880, there were approximately 2 billion passenger pigeons in the United States. By 1914, the species was ----------?