He wrote a long letter ___he explained what had happened in the accident.
In order to find _______ better job, he decided to study _________ second foreign language.
The biggest whale is ___ blue whale, which grows to be about 29 meters long—the height of ___ 9-story building.
We can never expect bluer sky unless we create less polluted world.
Some people fear that ________ air pollution may bring about changes in _______ weather around the world.
This area experienced. heaviest rainfall in month of May. A. 不填; A. B. a; the C. the; the D. the; a