I ________ up to $5 000 by the time the new term begins in September.
| A．have saved | B．will have saved |
| C．will be saving | D．had saved |
"The final exam is coming. You'd better concentrate ___________ your study. " Mother informed me __________ it.
| A．to; of | B．on; off |
| C．in; on | D．on; of |
The shop was not far from here, so they went there on foot __________ by bus.
| A．instead | B．instead of |
| C．more than | D．than |
We will do it ourselves __________ asking others to help.
| A．instead of | B．instead |
| C．but | D．however |
Briggs will __________ as general manager when Mitchell retires.
| A．get away | B．take over |
| C．set off | D．run out |
Rod loves __________ clocks. However, he never manages to put them together again.
| A．taking apart | B．giving away |
| C．making up | D．turning off |