问题
选择题
--- What’s your brother?
---He _______ a teacher, but now he is a doctor.
A．used to be
B．was used to
C．use to be
D．is used to be
答案
答案：A
考察used用法。Be used to sth习惯于某事，used to do sth过去常常做某事。句意：你哥哥做什么工作？本句根据后文but now he is a doctor.，可知前文说的是过去常常做某事，故选A