Soon, his warm, inviting smile put me , and spent the next two hours talking casually.
—I’m terribly sorry I forgot your name just now!—________—it happens to all of us!
I haven't finished my composition. I ________ for two hours and a half.
Last month I was lucky enough to have a chance to make a trip into _____ space with my friend Li Yan ping, _____ astronomer.
Our class ______ forty-five students, in other words, forty-five students ______ our class.
The rare animals would die _______ if men were allowed to shoot as many as they wished.