He is playing cards _______ his friends. [ ]
You look very tired. Why ______ and have a rest? [ ]
It’s traditional in China to firecrackers on Spring Festival. —-But the serious smog（雾霾）nowadays needs us to stop it.
There is a blackboard ______ our classroom. [ ]
He made ______ decision to visit ______ Eiffel Tower the next day.