He came here without friends or ______and made his fortune.

--Mum, I’m going to visit my uncle. What about staying there a week?--A week is too long. Try to be back in a _____ of days.

It’s a major         for Obama and his national security team, to fulfill the goal once voiced by Obama’s predecessor, George W. Bush, to bring to justice the mastermind （设计者）of the 9-11 attacks.

I bought a dress for only 20 dollars in a sale; it was really a good ______.

We expected 50 people to take part, but the_____number was a lot higher.