Sir, you ________ take this seat. It’s just for the old.

He _______that, without any strong evidence, he was sentenced to 10 years in prison by the judge in the trial.

You'd better not ride the bicycle on snowy days; you ______ fall．

Within a few years China ____ well have the most advanced railway industry in the world.

—Please don’t tell anybody．
—I     . I promise．

According to the factory safety rules, all accidents _____ be reported to the safety officer.

—Are you coming for dinner?
　—I’m not quite sure. I ______ go to my uncle’s instead.

My computer ____start, no matter how hard I try.
-lt might have crashed.

Whether dying patients      be helped to end their lives is a tough moral question.

---who______it be that is knocking at the door?
---It_______be Father, but I’m not sure.