________ the office, Ifound the naughty boy _________ beside my desk, trembling.

The skirt ___ her 100 dollars. If I were her， I surely won’t take it. That’s too extravagant.

Lei Yang can’t help _______________ the room because he is busy with his work.

Do you like giraffes— Yes， I do. I think they’re __________.

tired professor, _____ in his new book in thepast three years, hasn’t realized the decline in his health.