It is amazing that the little boy can swim ________the river ________100 meters wide.
Soon after the quakes, one thousand soldiers were sent out to ______ the miners from the coal mine.
His wife ________him to stop smoking, but he didn’t listen.
The maths teacher told the naughty boys _____ so much noise in class.
A number of books in the library ____ been stolen so that the number of them ____ smaller than before.
Many of them ignored his advice, _______ they knew it to be very useful.