— Will you stay for lunch?— Sorry, I ______. My brother is coming to see me.

These books______very interesting. Many children like reading them.

(2013·安徽师大附中高三七模)Don't use water to put out the fire if oil catches fire. As is known, oil ________ float on water.

What              you do if you won in the lottery?

—________I do the laundry first, Mum?—No, you ________. You can do your homework first.