根据句意及所给首字母的提示写出所缺单词。

1．-What does CRI s________ for?

      -China Radio International.

2．My parents always e________ me to study hard.

3．We'll have a basketball match a________ Class One.

4．He is going to write a r________ for China Daily.

5．She trains very hard and she is not an overnight s________.

这个标志的含义是提醒车辆驾驶人前方路面颠簸或有桥头跳车现象。