Low-carbon lifestyle is of great benefit to improve the world environment. can be enjoyed from it until you have a deep understanding of it,however.
By this time next year we from the college.
_______, people injured in the earthquake are _______.
Some scientists think there are _______ 2,000 million flashes of lightning per year.
Whenever we are in ______ trouble, we should never lose______ heart.
We all know that, __________, the situation will get worse.