__________ with the size of the whole earth，the highest mountain doesn’t seem high at all.
| A．When compared | B．To compare |
| C．While comparing | D．It compared |
Life is like riding a bicycle. ________ your balance, you must keep moving.
| A．Keeping | B．To keep |
| C．Keep | D．Being kept |
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 |