25.I was about to leave for work ______the telephone rang.
The president of the World Bank says he has a passion for China, _______ he remembers starting as early as his childhood.
It was with the help of the local guide ________ the mountain climber was rescued.
Not once ________ to Michael that he could one day become a top student in his class.
The traffic on the main streets has a longer green signal than______ on the small ones.
People develop ______ preference for a particular style of learning at ______ early age and these preferences affect learning.