※ 다음 대화를 읽고 질문에 답하시오

A: Hi, Gi-ho.

B: Hi, Mike. Where are you going?

A: I'm going to a taekwondo class.

B: Really? (a) _____________ have you been

   learning taekwondo?

A: For five years.

B: Then, will you get a black belt soon?

A: Well, (b) 나는 그것이 가능하다고 생각지 않아

B: Why not?

A: Because I haven't practiced a lot.

B: I see.

1. 빈칸 (a)에 알맞은 말을 고르시오

① How much        ② How long

③ How many        ④ How far

⑤ How often