根据句意，写出括号内所给单词的适当形式。
It's my cousin's ____ (twenty) birthday next week.
The weather in Nanjing is ____ (pleasant) in summer. It's always too hot.
People screamed with____   (excite) when the match began.
He was so tired that he fell____ (sleep) soon after he went to bed.

根据句意，从下面的方框中选择适当的短语，有些词语需要变形。

The rain coat is used for____ the rain .
The book____ educating teenagers
____  my home , when you have time .
You are supposed to ____  when you meet someone for the first time in China .
He studies hard____  go to a good university .

在一个不透明的口袋中，装有5个红球3个白球，它们除颜色外都相同，从中任意摸出一个球，摸到红球的概率为（  ）