I found ______ not very difficult to keep away from the A/H1N1 Flu.
—Whose volleyball is it? —It ________ Carla’s. She doesn’t like volleyball at all.
—_______ do you improve your English?—I improve it _______ reading aloud.
After a heavy rain , There is ___________ water on the playground .
If he ________harder , he will catch up with us soon .
Beijing is one of the _________________ in the world today .