I reminded Mr. Yang of the with Mr. Smith this afternoon, but he told me to put it off, because he had an important meeting to attend at 2:30.
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; theC. the; theD. the; a
When his brother was to cross the street, he was knocked down by a truck and badly ____.