Historical experience can as a most important source of information.
| A．serve | B．use | C．regard | D．prove |
When will you _______ me the money that was borrowed?
| A．pay | B．repay | C．pay for | D．repay for |
I insisted that he_______ at once.
| A．leave | B．left | C．leaves | D．leaving |
I looked everywhere in the house ______ a key that had been lost.
| A．in searching for | B．in search of |
| C．to search | D．searching of |
The man is standing _______ his back _______ the fire.
| A．with … to | B．with … against | C．on …for | D．at … of |
I don’t want to _______ money on such books.
| A．cost | B．pay | C．spend | D．take |