—Is this your ______?—Yes, it is. Her name is Ann.
—_______ 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 .
I don’t know if he __________ tomorrow . If he _______ here , I will call you .