Many people expect that credit cards will eventually______ paper money for almost every purchase.
A. trade B. replace 
exchange D. reduce
Many people in the city ______ the mayor of having swallowed his word.
| A．accused | B．blamed |
| C．charged | D．scolded |
I hope to go to college next year, ______ I pass the exams.
| A．assumed | B．assume |
| C．assuming | D．to assume |
His promise ______ he would give away half of the year's income to the disabled turned out a lie， ______ made the public feel cheated.
| A．which; what | B．that; which |
| C．what; which | D．which; that |
______ the rising house prices will be under control is what worries people most.
| A．What | B．Whether |
| C．That | D．Why |
No one really knows exactly when the first group of people arrived in ______ we now know as California.
| A．what | B．when |
| C．where | D．which |