Let those in need _______ that we will go all out to help them. 

—Come on, please give me some ideas about the project.—Sorry. With so much work _______ my mind, I almost break down.

So far, several cases of a disease,        as bird flu, are reported to have been found in the country.

 If water becomes increasingly scarce in decades ________，water shortage will become a hot issue all over the world.

 __________ to train his daughter in English, he put an advertisement like this in the paper, __________an English teacher for a ten-year- old girl.