-People in Colombia needn’t make plans to meet their friends. They often just drop by them.

 But much of the world’s water ____ from rivers and lakes.

Last weekend, an English short play was _____ in the second hall.

Personally I don’t quite agree that people ________dangerous animals as pets.

—I think it’s very dangerous to drive six hours without a rest.—I agree. Six hours           really a very long time.