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
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