1 . What if the only way of getting news from faraway friends was writing letters that took ages to be _________ (递送)?（根据汉语提示单词拼写）

2 . ________ (catch) in sandstorms was a terrible experience. （所给词的适当形式填空）

3 . In the second type, the shark pushes you with its nose to find out if you are fit __________, and
     then bites you if it thinks you are.

A．to eat

B．to be eaten

C．for eating

D．for being eaten

4 . Tom thought it was an honor ___________ to speak in the ceremony.

A．to invite

B．to be invited

C．inviting

D．having invited