His expression suggested that he _______ ill, so the teacher suggested that he _______ sent to hospital at once.

We were all surprised when he made it clear that he ___ office soon.

If  we ___________some measures, we might have prevented the environmental pollution．

(2009·江苏高考)He did not regret saying what he did but felt that he________it differently.

--- He didn’t turn up last night, did he? --- Yes. But he _______. The meeting had been cancelled.