How____ is the population of the world?  

–Did you visit the 23rd National Books Expo last month?–Yes, it was really ______. We saw many famous people, like Mo Yan, Ni Ping and Yu Dan.

You should find a _______ chance to explain everything to your mother, because she’s still angry with you.

The boy is not           to go to school.

—How ____ the medicine tastes!—Yes. But the medicine will really work soon after you take it.