The schoolboy _________to the blind man on his Way home yesterday afternoon．

Mom, I have great trouble with my math. —Never __________ and you will learn it well.

Where is your sister, Dick? I need her help. — Dad, she in her room. Let me help you instead.

The number of the classes in our school is __________ than__________ of any other school in Nanjing．

Have you finished your homework?－Yes, I have. I it this morning.