Mary told me that the book must ______ to the library in two days.
China has the _____ population in the world.
—David has made great progress recently.—_____, and _____.
—_____ you _____ your homework yet?—Yes, I _____ it ten minutes ago.
Now most families have only one child _____ our country’s one-child policy.
— Hello, this is Tom. Is Jack in?— Sorry, he to his uncle’s home. May I take a message?