— Is there a flight to London this evening? — There ______be. I’ll phone the airport and find it out.
7.Although the causes of cancer ____, we do not yet have any practical way to prevent it.
6.I have to go to work by taxi because my car ____at the garage.
5.―Have you handed in your schoolwork yet? ―Yes,I have. I guess it ____ now.
4.It is said that the early European playing-cards ____ for entertainment and education.
3.As the years passed, many occasions―birthdays, awards, graduations ____ with Dad’s flowers.