Questions 16-17
Henry: Some scientists explain the dance of honeybees as the means by which honeybees communicate the location of whatever food source they have just visited to other members of the hive. But honeybees do not need so complicated a mechanism to communicate that information. Forager honeybees returning to their hive simply leave a scent trail from the food source they have just visited. There must therefore be some other explanation for the honeybees’ dance.
Winifred: Not necessarily. Most animals have several ways of accomplishing critical tasks. Bees of some species can navigate using either the position of the Sun or the memory of landmarks. Similarly, for honeybees, scent trails are a supplementary not an exclusive means of communicating.
16. The point at issue between Henry and Winifred is whether
(A) theories of animal behavior can be established on the basis of evidence about only one species of animal
(B) there is more than one valid explanation for the dance of honeybees
(C) honeybees communicate the location of food sources through their dance
(D) the honeybee is the only species of bee that is capable of communicating navigational information to other hive members（C）
(E) the honeybee’s sense of smell plays a role in its foraging strategies
这题前人讨论过。但我觉得我还是有理解偏差：
Henry's point : Honeybees communicate the location of food sources not through their dance, but through leacing a scent trail from the food source.
Winifred's point: Not necessarily( what does that mean?) honeybees don't use scent trails as an exclusive means of communicating. Scent trails are a supplementary means.
我认为Winifred 并不关心 whether honeybees communicate through dance, what he cares is honeybees don't use scent trails as an exclusive means of communicating
so I don't get it why choose B
我就是选的B
H ： 蜜蜂不是通过跳舞相互通知蜜源，而是通过留下蜜源的香味
W: 留下蜜源的香味只是其中的一种方式（don't use scent trails as an exclusive means of communicating. Scent trails are a supplementary means）
所以我觉得他们在谈论蜜蜂是否通过留下蜜源的香味，而不是谈论蜜蜂是不是通过跳舞相互通知
麻烦指出错误！
原文在讨论的事dance是否起cummunication的作用。H认为不必要用跳舞的方式，只要留SCENT就行啦。W认为可以SCENT和DANCE都可同时起COMMUNICATION作用，SCENT并不排除DANCE。原文并没有解释是否DANCE有多种原因，而是DANCE是否起COMMUNICATION的作用。
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