It is difficult for us to learn a lesson in life ____we’ve actually had that lesson.

_____your friend come from England Yes,he’s an English boy.

Every morning, Mrs. Smith listens to the latest news _______ the radio.

The young pianist is very excited because theconcert given by him has never been ____ .

ang trained hard before the AsianGames in Guangzhou, and it ______. He won the gold medal in 110 meters’hurdles.