주어진 문장과 연결하기에 알맞은 문장을 <보기>에서 고르세요.
<보기> ⓐ I must hurry. ⓑ I must study hard. ⓒ I must clean the house.
(1) The train is leaving. ___________________________________
(2) I have a guest today. ___________________________________
(3) I have a difficult exam tomorrow. ___________________________________