You can’t imagine whatdifficulty we had ______ home in the snowstorm.

Eating _______ is bad for your health.Because you may be ______ fat.

_ human beings use it in a wrong way, like we did with nuclear technology, the advancement of science and technology has never led to decline of human development.

)You can give the document to _______is in the office.However, _______to require a written paper for it.

____careful we are, _____mistakes we will make.