He asks good questions and that shows that he_______ about the n

He asks good questions and that shows that he_______ about the next step in solving a A problem.（ ）
A、is always thinking
B、always think
C、always thinking
D、always thought
【正确答案】：A
【题目解析】：题干是一般现在时，且表明一直在想，而选项中能表示进行时态的只有A选项。