根据短文内容，选择最恰当的选项回答短文后的问题。

Little Duck’s shadow

Little Duck is watching the sun go down. It is getting lower and lower, but his shadow is getting longer and longer.

“Why is that?” Little Duck asks his friend Old Tree. “You are older and smarter than me. Tell me --why is my shadow longer when the sun gets lower?” Old Tree says, “That’s easy, Little Duck. The sun goes down every day, and we grow older every day. Your shadow grows longer because you are growing taller. You are becoming a big beautiful bird!”

【小题1】—What is the Little Duck watching go down? (       )
—______

A．Old   Tree.

B．The sun.

C．His shadow.

【小题2】— Who is younger in the text? (       )
—______

A．The duck.

B．The tree.

C．The sun.

【小题3】— How is the little duck’s shadow when the sun gets lower? (       )
—______

A．Getting lower.

B．Getting older.

C．Getting longer

【小题4】—Does the sun go down every day? (       )
—______

A．Yes, it does.

B．No, it doesn’t.

C．It is getting lower and lower.

【小题5】—How are our shadows when we are growing taller? (       )
—______

A．Longer.	B．Shorter.
C．Sometimes longer and sometimes shorter.