When and where were you born? I was born _______ a cold morning of 1999______ Dandong .
Rick has learned a lot about Chinese culture he came to China.
I can’t believe little girls can read many books.
It was dark I couldn’t see anything.
Many people didn’t realize the importance of health _______they have fallen ill.
— Would you like to climb the hill with us tomorrow? — If it ___________ ,I ___________.