both用法问题,急The two students ___12 years old.A,are both B both are选哪个?为什么不选另一个,说明原因

B 放在是动词be之后。如：
①The children are both lovely. 这两个孩子都很可爱。
②They are both from Australia. 他们两个都是澳大利亚人。

A
Both与动词连用时，大多数放在系动词be之后，其它动词之前。

选择A.
both 和all一样,放在be动词之后,行为动词之前.

选A。习惯用法是放在be动词之后的。
both [bəuθ]
adj. 两者的
conj. 不但…而且…
pron. 两者
例句与用法:
We can both run equally fast.
我们两个跑得一样快。
She kissed him on both cheeks.
她吻了他的双颊。
He has known both grief and happiness.
忧患和快乐他都经历过。
Proper diet and exercise are both important for health.
适当的饮食和运动对身体健康都很重要。
Good health may not only save your life, but it may save your love life as well. To bolster both, health experts advise following these6 steps.
身体健康不仅可以挽救生命, 还可以挽回你的爱情生活。要提高两者的质量, 健康专家建议遵循以下6个步骤。
Both his eyes are hurt.
他的两眼都受伤了。
Both are good.
两者都好。
He is both a soldier and a poet.
他既是个战士, 又是个诗人。