Look! There are ________ birds ______the tree.
The volunteers a lot of help to the community for nearly ten years.
This is the time during days that he has made the same mistakes.
your help, we couldn’t finish the work such a rainy day.
—Do you know man in blue? —Yes, he is a professor of Jiangsu University.
—I’m going to buy a car. Any advice, Charlie? —Well, it depends on(根据) ________. If money isn’t a problem, you can buy a BMW.