※다음을 읽고 물음에 답하시오. Yunju: Today gas is widely used for cooking. Steve: That's true. All the homes use gas for cooking. Yunju: We ㉠( ) be ㉡(care) when we handle gas. steve: Right. We should always be ㉡(care).
위 문장에서 ㉠에 들어갈 적절한 조동사는? ①will②can③must ④can't⑤ need not |