One evening when it was so warm, I stayed awake _________ until half past eleven in order to have a good look at the moon by myself. 

(2013·陕西，13)Let those in need ________ that we will go all out to help them.

A deaf-and- dumb(聋哑)man ________ some nails, so he entered a store, put two fingers together on the counter and made hammering movements with the other hand.

It was dark in the cave so she ______ a match.

Leaders of many countries have been trying to ______ what it is that makes China develop so fast.