根据句意，用所给的单词适当形式填空。
You can see some          (photo) of the trip on the Internet.
Most birds are active in the daytime, so you can         (easy) watch them there.
In the          (begin), Xi Wang drank her mother’s milk.
         (luck), there was just enough space for me to move.
They couldn’t stay there because one end of the shelf was much           (high) the other.