Please tell him to call me as soon as he _______ home.

May 12, 2008 , a terrible earthquake happened in Wenchuan . Lots of buildings __________ , and many students lost their lives .

Look! There is a big river. Let’s swim in it!—No, I think it’s _________ dangerous.

Will you please help me to repair the computer now?—Sorry. I’m too busy and I haven’t a minute to __________.

The books may for three days.