These new ideas which need ________ sound fine.
| A．trying on | B．trying out | C．to try on | D．to try out |
The incomes of skilled workers went up. ______， unskilled workers saw their earnings fall.
| A．Moreover | B．Therefore | C．Meanwhile | D．Otherwise |
The further falling of the stock market as reported today has _______ a fresh wave of selling.
| A．given off | B．set off | C．put off | D．got off |
In the current situation, ___________ the dollar goes above 1.85 reais, investors sell the greenback to take some profit.
| A．whenever | B．however | C．whatever | D．whichever |
Thanks to Mr. Smith the father and the son eventually______________ after ten years' cold relationship between them.
| A．took up | B．made up | C．looked up | D．turned up |
—A medical team was sent to Japan by air five hours ago.
—So they ______________ have arrived by now. The flight usually takes four hours or so.
| A．might | B．could | C．must | D．need |