—How often do I need to feed the fish?－They _______ food every day, or they will be hungry.

---Why didn’t you arrive there until three days later? ----Beccause the heavy rain _____the diffculities of the jurney.

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

To ____ nature is to help ourselves, or we will be punished.

-- Shenzhen _________ on the coast .--- Yes . It is _________ the north of Hong Kong .