—What are you doing?—____________. A. I'm read a bookB. I'm fineC. I'm reading a book
—__________ you at home yesterday? —No, I ___________.
The doctor often tells him __________ more exercise.
You should ___________ your little brother when your mother is out.
Sometimes walking is __________ than driving during the busy traffic time.
My sister was born _____________ a Friday morning.