1.The clowns and jugglers (has, have) always been my favorite performers.

2.Neither pencils nor an eraser (are, is) permitted.

3.All of the boats in the harbor (belong, belongs) to the village.

4.Either the wall clock or our wristwatches (tell, tells) the correct time.

5.Both my big brother and my sister (deliver, delivers) the morning newspaper.

1.have
2.is
3.belong
4.tells
5.deliver

All correct!