Why didn’t you answer my phone call, Jack?—I’m sorry, but I ________ then.

Linda is kind girl. Everyone in our class likes her.

Excuse me. Do you know ______ the theater?—There’s one next to the library.

Will Jim go hiking with us this weekend?— Maybe not. He _______ to visit his grandpa in the country.

Even the simplest everyday activities can make a real difference _____ the environment.[ ]