Bob is ____( young ) than Fred but ____(tall) than Fred.
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Yingtian is not as ____(tall) as Yongxian.
Almost all the students' faces are the same but Li Deming looks ____(fat) than before .
Which is ____(heavy), a hen or a chicken?
-- How ____(tall) is Sally? She' s 1.55 metres ____(tall). What about Xiaoling? She' s only 1.40 metres ____(tall). She is much ____(short) than Sally. She is also the ____(short)girl in the class.