Fred is second to none in maths in our class, but believe it or not, he _______ passed the last exam.

Why so many youths are _____ on playing computer games often puzzles us a lot.

I'm afraid this painting is not by Picasso. It's only a copy and so it's _____.

Not _______with the high marks in the exam, the determined student aimed high to get full marks next time.

As the international situation is growing more complex, what China needs should be a ___ foreign policy.