Cindy, you learn physics so well. What’s your ______—Doing a lot of exercises.

After half a day’s hard work, we made our classroom look as _______ as new.

It’s always foggy these days in our city. That’s really terrible!— Yes, and I hope to plant trees. ______trees, ______ air pollution.

We are all looking forward ______ the Great Wall during the National Day.

____, he doesn’t study well.