47. 他们相互之间再也不吵架了。52.

They___________ quarrel with each other_________.

46.他叔叔是十八岁那年参的军。

His uncle joined the army_________ _________ ________.

45. The athletes swam as fast as they could. (就划线部分提问)

_______ _________　 the athletes swim?

44. Liu Xiang won a gold medal at the 28th Olympics. (就划线部分提问)

　 __________ ________ ___________ Liu Xiang win a gold medal at?

43. Li Ming won the gold medal in the high jump at the school sports　　　 meeting last month (改为同义句)

　 Li Ming _______ _________ in the high jump at the school sports meeting last month.

42. We all think this a very old clock. (改为同义句)

　　 We all think this is______ _______ clock

41. American athlete Bob Beamon　 won the gold medal in the long jump in 1968. (改为否定句)

　 American athlete Bob Beamon _______ _______ the gold medal in　　　 the long jump in 1968.