-Where’s the old blue bag? - I’m not sure, but it ______ be thrown away. It be somewhere in the house. I saw it yesterday.
—I am afraid to ask questions because of my poor ______. —You’d better practice speaking more.
He didn’t wake up ________ he heard the noise.
He wrote books _______ they could learn about how he treated the sick.
I think he is one of ___________ players in the world.
You shouldn’t drive for more than three hours without ______ a rest.