（3）、These
are some of the Olympic athletes who have brought joy to people across the
world with their attempts to of human achievement.
（4）、As
a member of the International Olympic Committee, I have been invited to your school to
talk to you about the history and significance of the Olympic Games.
（5）、They
might then their parents and other people to give
up smoking, too.
（6）、Before
I consulted you, I had no that a company might try to fool
people into buying a product or service.
（7）、On
24 August, the mountain , pouring out a cloud of ash.
