—Is there _______ chicken in the hamburgers?— No, there isn’t _______.

It’s ________ here.

— There is a smile on Miss Gao’s face. She must be _______ with Sam’s work.— I think so. No one did as__ as him in our class.

He was lost in the busy streets. But at last it was _______ of him to find the way home.

---Why do you keep the windows open on such a cold day? ---There are so many students here, so we want to keep the air nice and __.