If you pay for the computer in cash, you could have a 5% discount; _______ we can deliver it to you for free.
I don' t think Xiao Li is ____ the other students ____ mathematics.
_____ hearing the news, I was wild ____ joy.
My father began to work ____ a bus driver when he was twenty years old.
This is a common mistake ____ students.
If you run ____ two hares you will catch neither.