He was born on _____ winter morning in 2006, when _____ most severe storm struck the city and caused hundreds of deaths.
An increased concentration of carbon dioxide and certain other gases in the Earth’s atmosphere ______ global warming.
Sometimes I act as a listening ear for fellow students ______ what is bothering them.
It was not until the end of the trip ______ I realized what a good feeling it was to have helped someone in trouble.
We would rather our daughter ____at home with us, but it is her choice, and she is not a child any longer.
In the time of social reform, people’s state of mind tends to keep _____ with the rapid change of society.