When the teacher came into the classroom, we all stopped.

I have finished a large part of the novel written by Dickens, the rest of which ___ very difficult

We wanted to get home before dark, but it didn’t quite as planned

When ____ to danger and conflict, men tendto increase blood pressure, ______ nervous and anxious.

It is said that our body _______ 206 bones; if one of _____ is broken, it will cause inconvenience of some kind