If you _____________ your study, I am sure you will make greater progress.
In many places in China,________ bicycle is still ________ popular means of transportation.
Have you heard ________ news? The price of ________ petrol is going up again!
The biggest whale is ________ blue whale,which grows to be about 29 meters long—the height of ________ 9story building.
We can never expect ________ bluer sky unless we create ________ less polluted world.
What ________ pity that you couldn't be there to receive ________ prize!