Leaders of many countries have been trying to _____ what it is that makes China develop so fast in recent years．

People _________ hobbies which offer enjoyment, knowledge and relaxation．

Each member country of WTO must _____ its laws and regulations and compete on the principle of fairness and co-operation.

After Billy said he would ride a bicycle safely, his father _____ to him and bought him one.

Once we _____, we should work hard until we succeed.

The one and only thing I ____ is whether you take a good rest！

Don’t believe what he said . His story is _____ nothing.

All my money _____ no more than ten yuan, so I can’t buy the dictionary.

Little Tommy felt the bag, curious to know what it ____.

David’s effort was ______, because he won the first prize in the English speech contest, _____ made his classmates surprised.