Study hard , ______ you will not pass the exam .
In his speech, Premier Wen Jiabao points out that creativity is ______it takes to keep a nation highly competitive .
The book is meant to ________needs it .
The couple are spending their holiday on ______is described as one of the most beautiful islands .
Many people wrote articles on ___Liu Xiang had failed to compete in the event . .
The government has announced that a modern city will be set up in ____is still a wasteland now .