Low-carbon lifestyle is of great benefit to improve the world environment. _______ can be enjoyed from it until you have a deep under, standing of it, however.
I found Jane ________ at the desk, ________ her homework carefully.
Don’t leave the matches or cigarettes on the table _______ reach of little children.
Teachers should keep students _______ a distance, but not _______ the distance.
AIDS is the biggest killer in the world, taking ________ lives each year than ________ disease.
The thunder _______ the little boy so much that he covered his cars.