Our government has taken some measures to overcome the lack of electricity, but it may take some time _____ we have enough power．
| A．since | B．after | C．unless | D．before |
Mother always complains that children________their shoes very quickly.
| A．find out | B．wash out |
| C．wear out | D．set out |
Traditionally，college students hold a graduation ceremony to encourage themselves before they ________ on their life journey.
| A．give up | B．settle down |
| C．get through | D．set off |
In much of the animal world，night is the time________for sleep－pure and simple.
| A．set aside | B．set down |
| C．set off | D．set up |
Team leaders must ensure that all members ________their natural desire to avoid the embarrassment associated with making mistakes.
| A．get over | B．look over |
| C．take over | D．come over |
Briggs will ________as general manager when Mitchell retires.
| A．get away | B．take over |
| C．set off | D．run out |