观察下面4个选项,从中选出不同类的选项。

The rule says that the last ______ the office should remember _____the windows.

Can you believe___little children can finish the difficult problem in___ a short time—I can’t believe it until I see it with my own eyes.

Each girl present at the party was wearing a flower in the hair, which__________their beauty.

How much do you know about the Youth Olympic Games to be held in Nanjing?—Well, the media ________ it in a variety of forms