单选题 Old-aged runners are especially encouraged to join the race.

单选题 If your English or American friends don't invite you to dinner at home, it doesn't show they don't like you.

单选题 When you are invited to go to your friend's home, you may go at any time.

单选题 The race is held in winter.

单选题 In England and America, it's not polite to ask the price of something.

单选题 The race starts in center Sydney and finishes at Bondi.

单选题 An annual long-distance running race in Sydney is "The City to Surf".

单选题 Local citizens take part in the race.