Peter likes to improve his health ______ doing sports every day.
She parked her car outside the window ______,but next morning she found it missing.
There’s smile on the teacher’s face. I think she’s ______ our work.
—I’m not sure ______ Bill will come or not.—No, he isn’t.
—I want to know ______ your son is.—He is ten years old.
She told me the sun ______ in the east.