dont do anything unless your teacher asks you··· to do B do C to do it D do it

问题描述:

dont do anything unless your teacher asks you··· to do B do C to do it D do it

选A:to do.
B,D肯定不对,从句只能有一个谓语.
C不对,因为句子要表达的意思“除非老师让你做,你啥也表做”,并无特指.
所以,剩下A,正确答案.