Mr. Li is a kind-hearted man. Though he is not rich, he always does everything he can __________the homeless children.
—What would you do if you had one million dollars? —I would________to the medical research.
—Your tea smells great! —It’s from India.Would you like________?
The World Health Organization has given some advice on________to protect us from being infected(感染)with H7N9.
—What do you usually help your mother________? —I often do the dishes.
--How clean the window is! --Yes. It ________ just now.