A woman in her 60s         gave birth to two test tube babies three years ago, after her only daughter died of gas poisoning.

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

There is no doubt that I'm trying to do what is best, but ________ I have got to consider the cost.

Our bodies are strengthened by taking exercise．_______ our minds are developed by learning．

 --- How long ____ was this? --- It’s been nearly six years now.