목적어가 필요없는 완전 자동사 (arrive, come, appear, disappear, speak ... )들은 수동태로 못만들잖아여
근데 문제를 보면 

English _________ in the Philippines.
(speaks / is spoken )

speak 는 완전자동사 여서 수동태를 만들 수 없으니 답은 speaks 인것 같은데 아니더라구여 ㅜㅜ
왜그런걸까여~? ㅜㅜ



그리고 또 한 가지

The operation _________ by a problem on the assembly line (작동은 조립라인의 문제에 의해 중단된다)

a)was interrupted   b)interrupts   c)to interrupt   d)be interrupted

이것의 답은 a)was interrupted 더라구여
d)be interrupted 는 답이 될 수 없는 건가여??

가르쳐주세요 ㅜㅜㅜㅜㅜㅜㅜ