It is well-known to us all that knowledge is __ treasure, but practice is ___ key to it.
| A．a, ∕ | B．a, the | C．the, the | D．∕ , the |
相关试题
No government can justly claim authority it is based on the will of the people．
| A．after | B．unless | C．so that | D．while |
The music sounded， the end of the class．
| A．indicating | B．indicated | C．to indicate | D．indicate |
Carbon
dioxidefrom burning fuels is the most common of the so-called greenhouse gases.
| A．produced | B．producing | C．to be produced | D．having been produced |
Staring at the priceless diamond amazement, Mary dreamt of getting one．
| A．with | B．by | C．at | D．in |
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