People are starting to use energy from the sun, wind and water because they cost very________ and will never ________ .

Look! There is a monkey eating ________ apple in the tree.—En, ________ monkey is very cute.

Rio de Janeiro still has a lot of things _____ to prepare for the 2016 Olympics.

This is the very letter ____came lastnight.

My grandma often ______ me some funny stories.