“Which sweater is yours?” “The one _______ No. 9.”
Her pronunciation is as good as, if ____than, her teacher's.
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.