Because he works far away from his parents, he visits them only_____.

We can get a lot of useful information on the Internet; ______, the Internet also provides us with a new way of communication.

A model or an experiment in a science class can help us see things which would       remain hidden．

Michelle Obama wears clothes that anyone can buy in a mall and ________ she may have a larger effect on consumers than ordinary models.

 John had planned to make a compromise， but      he changed his mind at the last minute.