We_______on this project for four hours. Let’s have a rest.
A．are working B．have been working C．worked D．had worked
Many people believe we are heading for environmental disaster _____ we basically change the way we live.
A．but B．although C．unless D．once
She longed for a pleasant trip in the summer, while her parents desired that she_______ at home, preparing for the coming exam..
A．stay B．stays C．must stay D．would stay
Jack has made great achievements in his work, and the harder he works, the more _________ he becomes.
A．religious B．energetic C．curious D．independent
This depends upon he is interested in doing this kind of work.
A．if B．whether C．that D．what
The World Trade Organization (WTO) finally opened its door to China on November 10, ______ our Chinese 15-year wait.
A．to end B．ended
C．ending D．ends
