The study you have been making _____ the ancient Chinese characters is an instructive job.
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?—_____
His mother had talked to him for many minutes while he was watching TV, but ____.