The job position in the advertisement requires that the applicant ______ at least 8 years of working experience.
| A．had | B．have |
| C．will have | D．has |
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 |
Since he often travels on business, he can ______ himself to sleeping in any place he can find.
| A．devote | B．accustom | C．force | D．reduce |
_____ took me almost 20 years to have the courage to ask my father this personal question.
| A．This | B．It | C．That | D．One |