_______, or you’ll fail the exam.A. Studying hard B. Study hard C. To study hard
—Is that girl Susan?—It be her. She left for Beijing yesterday.
In the piano contest, my brother didn’t play well and I did __________.
Mike is a good boy. He often _________ to help his classmates.
Lao She is one of _____________ of the twentieth century.
__________ you go jogging, ___________ you will feel.