He absorbed himself so entirely to his research that ____he made himself ill.

 I won’t buy the house, which was too expensive and too big. ______, I’d grown fond of our little rented house.

.Jim went to answer  the phone __________ , Harry  started  to prepare  lunch.

It’s widely known that first aid is      important and you can save lives if the right action is taken.

While reading, Helen has a habit of stopping _____ to give her long and flowing hair a smooth.