What an unforgettable experience! I’ll write it down ______it is till fresh in my memory.
The girl’s years of hard training _______ when she finally won the first prize.
As a father of three children, I need a job ______ so that we can survive.
In China’s countryside, villagers often have the same family name, but _______ not be closely related.
______ makes the school proud is_______ most students have been admitted by the key universities.
Can you imagine what problem may ______ when human beings are cloned?