John puts up his hand____the teacher asks a question.A,every time B,in time C,some time D,at times请

题目

John puts up his hand____the teacher asks a question.A,every time B,in time C,some time D,at times请

答案

A
这里只有 every time 可以引导时间状语从句
意为： 每次老师发问时, John 都会举手.