The Huanghe River is the second ___river in China.
—Must I clean all the plates after dinner? —No, you ______ . But you ______ finish your homework later.
—The second-hand smoke is even more terrible. —That’s right. It does great ______ to people around.
My brother is an active boy, he often risks _____ mountain with his friends.
—What’s wrong with my son? —______Serious, it’s only a cold.
I can’t go to bed because I still have _____ homework to do.