There is ____ office on the first floor(一楼).
Only when the work is done ________ be able to go back home.
In this exam, you’re asked to write a composition of about ________.
A direct order like “ Daisy, pass me the book” sounds rude. We’d better say: “________”
— Come and join us, Ben! — I’m afraid I can’t. I’m too busy now. If I ________ time, I would certainly go.
Which of the following does paper burn in?