如图所示，两块三角尺的直角顶点 $O$ 重叠在一起，且 $OB$ 恰好平分 $\angle COD$ ，则 $\angle AOD$ 的度数是____.

$24÷\frac{3}{8}=$ 64

语法填空。

    He is the man who for many people has been a role model. Now your biggest hero deserves a special day when you can express your thanks and let him know____ important he is to you. The third Sunday of June—which ____ (fall) on June 19 this year is Father's Day. The idea of Father's Day came from ____ American woman called Sonora Smart Dodd in 1909. Dodd wanted a special day ____ (honor) her father. He raised six children by ____ after his wife died. Dodd thought there needed to be a day to honor loving dads.

    The first Father's Day ____ (celebrate) on June 19, 1910. In 1924, US President Calvin Coolidge supported the idea of a  ____ (nation) Father's Day. Finally, in 1966, President Lyndon Johnson declared the third Sunday of June ____ Father's Day.

    Here are some ways to show your love and respect:

    Send him a greeting card. Fathers prefer cards ____ are not too emotional. So choose one that will make him laugh. If he has a computer, cover his desktop ____ words like “I love you Dad”. A small present, such as a framed photo of your family, can make him feel like a king.