In the time of social reform,people’s state of mind tends to         with the rapid changes of society.

Do you know which president of the USA _____ slavery?

The number of the eggs _____ by the hen this month is about 28.

The government is trying to do something to ______ the employment rate so that more people have jobs.

Returning from abroad, Miss Yu received from her lovely students a nice present to which a note was ______, saying “We love you!”