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
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
