It’ll be 3 days _____ he _____ back from his hometown.[ ]

Be quiet！Mr.Smith is coming.—Don’t worry.It ________ be him.Mr.Smith is much taller.

Sandy, please don’t tell anybody about our secret, OK— _______.

She was about to leave the room the telephone rang

patient who had suffered from H1N1 insisted on_____________fromothers immediately, holding the belief that the disease would infect others．