We should keep the classroom and tidy.
My uncle died ____ heart disease last summer.
Ryan made _____ his mind to study hard but he didn’t.A. in B/ C. on D. up
What _____ are you guys doing? I am freaking out(我很不安).A. in earth B in the earth C. on the earth D. on earth
We hadn’t plan to meet. We met ____ chance.
I was just talking to Margaret when Jackson ___.