—He must be busy doing his homework right now.—I imagine____.
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 .