Anyone can borrow books from this library _______ he keeps them clean and returns them in time.
| A．even if | B．unless | C．so that | D．as long as |
This is a story completely by him, so don’t rust him.
| A．discovered | B．invented | C．found | D．known |
Historical experience can as a most important source of information.
| A．serve | B．use | C．regard | D．prove |
Have a good rest, you need to your energy for the tennis match this afternoon.
| A．have | B．save | C．hold | D．get |
. It was so noisy out side that he couldn’t down to read.
| A．settle | B．put | C．sit | D．lie |
He offered to her a hand as the suitcase was too heavy for her to carry.
| A．hold | B．show | C．lend | D．borrow |