You can’t spread some news on the Internet freely you are sure about it.

________ will you come back from your work, Dad—In about half an hour, dear.

According to a research, smoking is bad for our health.—Yes, especially for teenagers. Students _______ to smoke.

Mr. Brown’s condition looks very serious and it is doubtful if he will ________.

What do you think of the Three Gorges Dam—I think it’s ________ fantastic man－made wonder.