It's a pencil.

那是一枝铅笔。

I usually wake up early.

我通常早醒。

What color is your book?

你的书是什么颜色？

My grandfather got married in 1921.

我的祖父在1921年结婚。

How are you going?Are you going by boat?

你怎样去?坐船去吗？

I didn't know whether to send the letter airmail or not.

我不知道是否送航空邮件。