---Tina, I want to have a pet. How about a dog?--- I prefer a cat. It is ______ to take care of.
We should keep our classroom ______.
—English is difficult for me. I can’t learn it well. —Don’t give up. Nothing is difficult if you work hard.
—______ did you do on Sunday, Kate? —I watched TV.
__________he is ill, __________ he goes to school.
They eat many but little .