The technological advances made it possible for the middle classes to enjoy what had once been ___only to the very rich.
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 ____.
He told me about the news in a voice.