With all the problems ______, the manager went home and had a good rest.

Is three o’clock _____ for you? — I am afraid I will be busy working in my office then. [ ]

If you don’t try your best to learn all subjects, you will ___ behind.

What shall we use for power when all the oil in the worldhas been _________

Which school are you studying in?— One which is ______ the Liaoning Teachers’ University.