다음 중 올바르지 않은 문장을 고르시오.

① He was only one who have done these tasks.

② Though being busy at that time, you should have called me as you are not a adult.

③ It was in 1945 which Korea became independent.

④ It helped me do the work more easily.

⑤ One of the most popular singers is her son whose name is Jeongguk.

⑥ I is he.

정답은 ①②③④⑤ 이런 동그라미 안에 있는 숫자 이용.

양심적으로 찍진 말자. 재미가 없잖아