---I argued with my best friend . what advice do you have for me? ---Well, you _________ say you are sorry, although it’s not easy.
There is no doubt that students ________in their study if they more praise from their teachers.
One of the important lessons children learn from their parents is ________
It is safe to eat chicken that ________fully, but most people still dare not do that because of the H7N9 bird flu .
More historical buildings in the old town will fall down ________we try our best to protect them.
— Do you know the young boy ________ is reciting a Tang poem over there? — Yes. He's a friend of ________ .