-- what's his brother -- he is a teacher he --- maths at a schoola\ taughtb\ has toughtc\ teachesd\ will teach请您说明理由好吗?

-- what's his brother -- he is a teacher he --- maths at a schoola\ taughtb\ has toughtc\ teachesd\ will teach请您说明理由好吗?
-- what's his brother -- he is a teacher he --- maths at a school
a\ taught
b\ has tought
c\ teaches
d\ will teach
请您说明理由好吗?

-- what's his brother -- he is a teacher he --- maths at a schoola\ taughtb\ has toughtc\ teachesd\ will teach请您说明理由好吗?
答语：他是一个老师,
所以后半句说的是：他在学校教书.
使用一般现在时,第三人称单数形式,
即：teaches


选择C

选择C
他在一所学校教数学
因为之前的回答用了is，所以后一句也用一般时

C。前后时态一致。

当然是c了。 根据句意只是陈述“他教数学”这样一个事实，就用一般现在时就可以了，比如“我每天吃苹果”就说“i eat apple every day"就行了