While she _________ TV in the sitting room, the bell________.
| A．watches, rings | B．is watching, rang | C．was watching, rang | D．watched, was ringing |
Some aspects of a pilot's jobbe boring, and pilots oftenwork at inconvenient hours．
| A．can ; have to | B．may ; can |
| C．have to; may | D．ought to; must |
Though it's a challenging job, he did itit took me．
| A．one-third a time | B．one – third time |
| C．the one - third time | D．one - third the time |
—What's the matter with John? He has been sitting there for hours．
—A postcard from his fatheran attack of home - sickness in him．
| A．took up | B．set off | C．brought in | D．built up |
to playing computer games, he is always absent from school．
| A．Lost | B．Addicted | C．Buried | D．Absorbed |
—Was it by cutting down staffare not diligent enoughshe saved the firm?
—No, it was by improving work efficiency．
| A．that; when | B．that; what | C．who; how | D．who; that |