--- I hear Robert has gone to Harvard University for his master’s degree. --- Oh, how nice! Do you know when he ____?
This church is as old as, if _____ than, that one.
In that month, he earned as much as, if ____ than, $40 000.
The problem is not _____ easy. Think _____ over.
It is so difficult a problem that _____ student in this class _____ work it out.
.Please make my excuse at tomorrow's meeting. I've got too much work _____.