1£®It is high time that we should_devote/devoted(devote) ourselves to environmental protection and ecological improvement.

2£®The doctor ordered that the patient(should)_be_sent_(send) to hospital without delay.

3£®I would rather you_had_finished (finish) your homework yesterday.

4£®—How I wish I had_passed (pass) the exam!

—So you're sorry that you didn't work hard.

5. Though his face suggested that there was (be) nothing serious, the doctor still suggested he_(should)_stay (stay) in bed for a few days.

6£®John wants to see me now, but I have so much work on hand that I would rather he came (come) tomorrow than today.