New words：

theme [θim] n.主题；主旋律

Sample Sentences：

Stamp collecting was the theme of his talk.
The novel's central theme is war and peace.
The theme park attracts 2.5 million visitors a year.

New words：

revolve [rɪˈvɒlv] v.（使）转动，（使）旋转；环绕，围绕

Sample Sentences：

The fan revolved slowly.
The earth revolves around the sun.
She thinks that the world revolves around her.
Since childhood, her life has revolved around tennis.

New words：

blank [blæŋk]
adj.空白的；空的
n.空格；空白

Sample Sentences：

Suddenly the screen went blank .
Sign your name in the blank space below.
If you can't answer the question, leave a blank.
My mind was a blank and I couldn't remember her name.
Write on one side of the paper and leave the other side blank.