Tom, clean up the broken glass _________ someone walks on it.
_______ the top leader, all of the other officers entered the hall.
To her anger, when she sat down, she found a piece of paper on her desk _____ “Stupid Sarah got a D!”
Mr. White, along with his assistants, ______ on the project day and night to meet the deadline(最后期限).
------How many chapters does the book have? ------It _________ three chapters.
—How about going camping with us this weekend?—_____