读句子，猜谜语。

1. It's long. It has no legs. It lives in a hole.

→ ______________________

2. It's tall. It has a long neck. It eats leaves. It walks slowly.

→ ______________________

3. It's black and white. It has two big black eyes. It's fat. It eats bamboos (竹子).

→ ______________________

4. It looks like a horse but it has stripes. The stripes are black and white. It eats grass.

→ ______________________

下列哪项不是落枕的发病原因的是（）。

A.睡觉时枕头过高

B.睡觉时枕头过低

C.睡觉时头颈过度偏转

D.睡觉时颈部遭受暴力打击

E.睡觉时枕头过硬