Have you ever met with this case in your life you can't understand others even if they have said something several times?
If you miss this chance, it may be years ____ you get another one.
I just heard____ bank where Dora works was robbed by____ gunman wearing a mask.
The meeting will be held in September, but____ knows the date for sure.
-Is Peter coming?
-No, he____his mind after a phone call at the last minute.
一Why don’t you consider a trip to, say, Beijing or Hangzhou? 一.