—You’d better not put too much salt in dishes, Granny. It’s bad for our health.— .
The maths problem is so difficult that none of them can .
The foreigners have been in Beijing for three years, so they are familiar the city .
We should try our best English well.
We should students computer games.
– These tickets are useless. Can I ? --Yes, but make sure you put them in the dustbin.