27.After the adventure, the children returned home, ______.
-----Can you come for dinner on Sunday or Saturday? -----I’m afraid _______ day is possible.
It is not just the size of the Olympic Games ___makes them unique, but ____they mean to us .
-----Now, where is my ticket ? -----______. We will be late for the film.
The astronauts started their journeys in rockets _____ forward by jets of hot gas.
The concert by Lang Lang was so well ______ that all the tickets had been sold out on the first three days last month.