He _______ have completed his work；otherwise, he wouldn’t be enjoying himself by the seaside.

On rainy days, accidents ______ happen sometimes on steep roads．

These days some young people just ________ work hard because they have got used to the easy life provided by their parents.

The number of teachers in our school _______ greatly increased last term.A number of teachers in this school ______from the countryside.

Being honest ______ not get you a lot of friends, but it _______ always get you the right ones.