根据句意，从方框中选择适当的短语完成句子。
a lot of, on the land, come from, in the sky, fewer and fewer
【小题1】It's autumn now and there are __________ leaves on the tree.
【小题2】The word “Europe” might __________ Greek (希腊语).
【小题3】You can see __________ old paintings in the Guangzhou Museum.
【小题4】Look! A plane is flying __________.
【小题5】Elephants are the biggest animals __________.