－What’s his brother?－He is a teacher. He maths at a school.A. taught B. has taughtC. teach

问题补充：

－What’s his brother?

－He is a teacher. He maths at a school.

A. taught

B. has taught

C. teaches

D. will teach

答案：

A. taught

B. has taught

(答案→)C. teaches

D. will teach

解析：通过He is a teacher,我们可知他现在是老师，应该是现在在学校教数学。是说的现在的情况，而非过去或将来，应该用现在时，而非过去时或将来时，所以AD是错误的。现在完成时，表示过去发生的动作对现在的影响和结果，通过题意可知，此句并没有表示此种意义。所以本题选C。