The police said they would not give up looking into other possibilities ____they find out what happened.
---She looks very happy. She ______ have passed the exam.---I guess so. It’s not difficult after all.
---I hear Tony ______ as a lawyer. Why did he quit teaching?---Who knows? Maybe he just wants to experience a totally different life.
______ more than half of us were against the new plan, he still decided to carry it out.
---What do you think of the two students ______ to take part in the competition?---They are hardworking as well as intelligent.
You should _____ the advantages and disadvantages before making a decision.