When he saw all his books _____ here and there on the floor, he knew that something terrible _____. 

—I failed again. I wish I _________ harder.—But you _________.

He suggested that a new library_________ near the key high school.

Jeffery said he          to the get-together the next day, but he didn’t．

English is a language that many people around the world ____ not speak perfectly but ____ at least understand.