Be patient with your students ______ it takes time for them to adjust to their new way of school life.
He told me the news_____, believe it or not, he had earned $1 000 in a single day.
In that month, he earned as much as, if ____ than, $40 000.
The research is so designed that once _____ nothing can be done to change it.
If _____ carefully, the experiment will be successful.
He is a man of few words, and seldom speaks until _____ to.