_________ is a growing world problem, and nowadays the United Nations and its member countries _________hard to deal with it．
| A．Desertification; are working | B．Desertified ; worked |
| C．Desert; work | D．Desertification; have worked |
It was sad to me that they, so poor themselves, ________ bring me food.
| A．might | B．would | C．should | D．could |
—Dad, I don’t think Oliver the right sort of person for the job.
—I see. I’ll go right away and ________.
| A．pay him back | B．pay him off | C．put him away | D．put him off |
The lecture, a lively question-and-answer session followed.
| A． | being given | B． | having given | C． | to be given | D． | having been given |
The idea “happiness, ” ________, will not sit still for easy definition.
| A．to be rigid | B．to be sure | C．to be perfect | D．to be fair |
She was put under house arrest two years ago but remained a powerfulin last year's election.
| A． | symbol | B． | portrait | C． | identity | D． | statue |