My mother always has_____housework to do on weekends.

It’s difficult for the village children to cross the river for school. — I think a bridge ________ over the river.

It`s not easy _______ Chinese students _______Englishwell.

the danger ahead on the railway line, hedecided to go to Beijing by plane instead

(2013·陕西宝鸡二模)The British are not so familiar with different cultures and other ways of doing things, ________ is often the case in other countries.