It was too cold and windy , so we could see ____ people walking in the street .
---I think students should have mobile phones to call their parents.---___________. They often use them to play games instead.
Traditionally, Chinese people _______ the Chinese characters Double Happiness and stick them onto walls or doors at the weddings.
There is no doubt ________ the Diaoyu Island is part of China's territory.
---Is the Youth Center open to the public yet?---Yes. It ______ for almost one and a half years.
If he ___________ on time, we will go without him.