I’ve had enough of my boss. He is rather too hard ___________ me.   

Studying abroad costs so much money that it is    the reach of those with average income．

The magician picked some persons from the audience _____ and asked them to help him with the performance．

Scientists are convinced ______ the positive effect of laughter ______ physical and mental health.

The law does not allow people to accuse themselves _____ a crime.

I’m sure he will finish the report        .

Neither of them knows the difference ______ the two and we can’t tell one ______ the other, either.

A friend of ______ went to the railway station to see ______．

—Given its breathtaking natural landscape and a relaxing atmosphere—most stores in Norway are closed at 5 o'clock every day．
—It's _______ that Norway has the highest quality of life．

--- How did you react _____ your father's suggestion ?
--- I reacted strongly _____ it .