男孩们正在操场上练习打篮球.
The (秘密) of true friendship is to understand and to be understood.
Thank you for (警告) us not to swim here.
Believe it or not, the two surveys have (相似的) results.
The future is something we (创造), but not something we enter.
Many visitors come to Beijing and hope to watch the raising of the national (旗帜).