He has been the computer for two hours, chatting with a boy from Australia.
Each of the students, working hard at his or her lessons,___to go to university.” “So do I.”
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.