eaches us not to regret over yesterday, for it ________ and is beyond our control.

I have never learned about the western art and that makes ______ difficult for me to understand the paintings of the Middle Ages.[ ]

(2013·山东潍坊高三联考)The scientist won the Nobel Prize in Chemistry, ________ made him famous all over the world.

w diplomat, he often thinks of hecan react more appropriately on such occasions.

In China today women ___ 40% of the workforce, and nearly half of the others with children are in paid work.