— It is around 100 years, known to us all, ______ the first modern Olympic Games was held.— It really is. But were _____ ?

—Have you ever been to Singapore?—Yes, I ________  there three times in 2009 alone.

He was in poor health，so the doctor________him to drink wine.

All the　　　 newspapers　　　 the trade talks between China and the United States.