He must be in the classroom ,___he?

He must be in the classroom ,___he? He may be in the classroom,isn't he 这句子对吗?不对怎么改,改成must be Listen.There must be someone_____ in the classroom He must be ill,___he doesn’t come to school. He must be in the office,______he? HE ( ) in the classroom just now.he ( )be there now He must have attended the meeting yesterday,___he? He ______ be in the classroom,I think. he___ be in the classroom,i think.no,he ___ be in the classr i think he may be in the classroom. No , he () be there. i s Isn't Dick sitting in the front of the classroom?___He's the 31.—Who is singing in the classroom  — must be Susan .A