—Watch!
—I ____ but ____ I ____ anything unusual.
watched; have watched B．have watched; am not seeing
C．was watching; wasn’t seeing D．am watching; don’t see
I can’t buy ________that one.
| A．as good a book as | B．as a good book as |
| C．such good book | D．so good book as |
The troops _______ themselves to go into battle.
| A．prepared | B．were prepared | C．to prepare | D．preparing |
But for friction (摩擦力), people ______ neither walk, nor even stand up.
| A．can | B．were able to | C．will be able to | D．could |
It was after he got what he had desired_____ he realized it was not so important.
| A．that | B．when | C．as | D．since |
He was allowed to go swimming _______ he kept near the other boys.
| A．on condition that | B．as far as | C．even if | D．as though |