51 be made of由……制成(制成以后還看得見原材料)

52 be not sure表不確定

53 be on a visit to參觀

54 be popular with sb受某人歡迎

55 be quiet安靜

56 be short for表**的縮寫eg:陶is short for陶俊杰

57 be sick in bed生病在床

58 be sorry to do sth be sorry for sb eg : I am sorry for you

59 be sorry to hear that 60 be sorry to trouble sb eg : I am sorry to trouble you

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