You have to have a good preparation for the exam__________ you can do well in it.
Teenagers ______ their health because they play computer games too much.
The World War II made ______ impossible for Einstein to go on with his research.
It’s not ______ good idea to drive for four hours without ______ break.
--- Would you be able to go to the party ? --- _______.
Three fourth of the homework _______ today .