Sometimes the ______ between the reality and the dream is so great that it produces disappointment. 

Everybody in the village likes Jack because he is good at telling and________ jokes.

 She wanted to ask if he had news of Williams, but words ________ in her throat.

The Chinese government has overcome problems of population and economy to     ________  its “nine years of compulsory education”．

At the end of the race his legs ____ and he fell down on the ground.