The well-known director, two of________ films won Oscar awards, is said to have retired.

What do you think of Tom’s decision to leave the company—I have nothing to say. I don’t think I should _____ his decision.

He worked hard to some money for his retirement.

Last week the students did the experiment in order to_______ if iron rusts in dry air．

Energy ______ under the earth must give off in one form or another, for example, an earthquake.[ ]