Some people plan to ______ a volunteer project to help the disabled children.
Susan won't arrive at the airport on time _____ she hurries up.
I think the dictionary must ____. It has his name on it.
I could speak French Chinese, but luckily I could talk with them in English.
--- Will you please answer the door? It _______ be your sister.---Sorry, I ________. I'm feeding the rabbit.
-Jim, is physics difficult to learn in high school?-Sure. No subject can be learned well hard work.