At school, it is essential that every child ______ equally regardless of family background. 

_______ from her parents, she was left with her two young sisters--aged three and seven.   

Tim Bemers-Lee is generally considered ____ the World Wide Web, on which all the information is shared by all.

It was __________ computer games that cost the young man a lot of precious time that heshould __________ on his lessons．

Generally speaking, _______ according to the directions, the drug has no side effect.