Study hard,_______ you will not pass the exam.
Jack, _______ eat in class. It is not polite.
--- Hey, guys. Do you often have a good time ________ after-school activities?--- Of course, we do. And we always have a lot of time ________ soccer.
You had better________ wine because you have to drive back home.
---What took you so long?---I got lost. I have no ________ of direction.
--- What do you think of summer in Nanjing?--- Well, it’s sometimes ______ hot and sometimes there is ______ rain.