At college, Barack Obama didn’t know that he the first black president of the United States of America.
| A．was to become | B．becomes |
| C．is to become | D．became |
The red lanterns and colorful banners hanging everywhere ________ the festival atmosphere of the school.
| A．adapt to | B．add to |
| C．refer to | D．relate to |
Don't use water to put out the fire if oil catches fire. As is known, oil ________ float on water.
| A．shall | B．must |
| C．may | D．will |
The chairman ________ hold office for five years according to the constitution.
| A．might | B．could |
| C．need | D．shall |
—David, your application for a loan has ________.
—Thank goodness! I badly need it now.
| A．gone through | B．pulled through |
| C．taken over | D．signed over |
Military helicopters dropped food and medicine to the earthquake survivors that remained ________ in remote mountain villages.
| A．cut off | B．paid off |
| C．put off | D．laid off |