Mr. Li is a kind-hearted man. Though he is not rich, he always does everything he can __________the homeless children.
—Would you mind my smoking here?— ______.Look at the sign . It says “No smoking.”
— Could you please tell me _______you will visit the museum? — The day after tomorrow , I think .
After supper,I often go for a walk ______the river near my house.
The English-Chinese dictionary ____my father bought for me many years ago is so useful.
He used to _______in the sun ,but now he is used to ______at night.