------ Who is that man over there? _______ it be our teacher?
------ No, it _______ not be our teacher. It _______ be Mr. Zhang.
| A．can ; can; must | B．must; must; can |
| C．can; must; must | D．can; must; can |
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 uponhe 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 |