it is widely believed that the pull of gravity on a falling raindrop changes()round shape into a

Question

teardrop shape A.of the drop B. the drop's C a drop of D drop's 选什么为什么这么选

Answer 1

B
It is widely believed that the pull of gravity on a falling raindrop changes the drop' round shape into a teardrop shape. 句中的it 是形式主语，正式主语是that引导的从句，称为主语从句，由于正式主语太长了，所以，用it代替，并且后置。
在主语从句里， the pull of gravity on a falling raindrop 是主语从句的主语，changes是主语从句的谓语， the drop' round shape into a teardrop shape是主语从句的宾语。

Answer 2

答案：B

翻译：大家都认为，降落的水滴所受的重力把水滴的圆形改变成泪珠的形状。

解释：从句意来看，选项必须做定语去修饰shape，以和后面的shape对应。
所以用名词所有格形式，排除AC。
第二次出现drop，所以用定冠词the最佳，排除D。追问

再问一下the bicycle's weight和 the bicycle weight 还有 the weght of bicycle's 和the weighet of bicycle这四个的区别

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