안녕하세요 문법문제 밑에 올린건데 좀 어려운거라;ㅠ; ( 2005년 육사문제) 잘이해가안가서 다시질문합니다 답이 5번인데 빈칸 A의 출제의도는 무엇인가요..? ( which 와 in which가 나왔을때 무엇으로 답을판단?) B는 수동태 능동태구별같은데 수동태부정은 Be +not ~ 인가요..? 그리고 마지막빈칸 B문장 So부터해석좀;; 답변좀부탁드려요~ 빈칸 a , b 에 들어갈 말로 올바르게 짝지은 것은? Sometimes raindrops are heavy, fat drops. Other times fine, small drops seem to fall lightly. the differenve in size is caused by the kind of cloud  ( A ) . Big, fat raindrops usually come from thunderheads, those tall cumulus clouds mommon in summer. the wind currents force th droplets up and down against each other and they gorw bigger. the big drops fall faster than the small drops. On the other hand, the small raindrops tend to form in horizontal, layered clouds. There is much less turbulence in these clouds. So the drops ( B ) larger drops. 1. in which they form - don't force together into 2. which they are formed in  - don't force together into 3. which they form - don't force together into 4. which they form - are not forced together into 5. in which they form - are not forced together into